This is the Xperia XZ2 Premium User guide for the Android™ 8.0 software version.
If you're not sure which software version your device is running, you can check it in
the Settings menu.
System and application updates can present the features in your device in another way than
described in this User guide. The Android version might not be aected in an update. For
more information about software updates, see
To check the current software version and model number of your device
1Find and tap Settings > System > About phone.
2The current software version is displayed under Build number. The current
model number is displayed under Model.
Limitations to services and features
Some of the services and features described in this User guide may not be
supported in all countries or regions, or by all networks or service providers. The
GSM International Emergency Number can always be used in all countries, regions,
networks and by all service providers, provided that the device is connected to the
mobile network. Please contact your network operator or service provider to
determine the availability of any specific service or feature and whether additional
access or usage fees apply.
The use of certain features and applications described in this guide may require
access to the internet. You may incur data connection charges when you connect
to the internet with your device. Contact your wireless service provider for more
information.
Your device only supports nano SIM cards. Single SIM devices allow you to use one
SIM card and a memory card.
The SIM and memory cards go in dierent parts of the nano SIM and memory card
tray. Make sure you don’t confuse the two.
For information on how to check if your device is Single SIM or Dual SIM, see
Finding the IMEI number(s) of your device
on page 15.
To prevent data loss, make sure you turn o your device or unmount the memory card
before you drag out the holder to remove the nano SIM card or memory card from the
device.
Do not cut your SIM card, as this may damage your device.
1Drag out the SIM card tray.
2Place the SIM card securely in the SIM card tray, as shown in the illustration.
3Place the memory card securely in the tray, in the correct orientation as
shown in the illustration.
4Gently push the SIM card tray back into the slot until it fits into place.
Assembly – Dual SIM
Your device only supports nano SIM cards. Dual SIM devices support the use of
either two nano SIM cards or a nano SIM card and a memory card.
Dual SIM devices are not available in all markets or from all operators.
For information on how to check if your device is Single SIM or Dual SIM, see
Finding the IMEI number(s) of your device
To prevent data loss, make sure you turn o your device or unmount the memory card
before you drag out the holder to remove the nano SIM card (or cards) or memory card from
the device.
To insert either two nano SIM cards or a nano SIM card and a memory card
Do not cut your SIM card, as this may damage your device.
1Drag out the SIM card tray.
2Place the main SIM card securely in position for SIM1, as shown in the
illustration.
3Place either the second SIM card or the memory card securely in the tray, in
the correct orientation as shown in the illustration.
4Gently push the SIM card tray back into the slot until it fits into place.
Screen protection
Before using your device, remove the protective films from the front and back to enable full
functionality.
Screen and phone covers may help you protect your device against damage. We
recommend you use only those covers intended for your Xperia device. The use of
third party screen or phone covers may prevent your device from working correctly
by covering sensors, lenses, speakers, or microphones and can invalidate the
warranty.
Starting your device for the first time
It is recommended that you charge the battery for at least 30 minutes before
starting up your device for the first time. You can still use your device while it is
charging. For more information on charging, see
page 35.
The first time you start your device, a setup guide helps you to configure basic
settings, personalise your device and sign in to your accounts, for example a
Google™ account.
It is recommended to charge the battery for at least 30 minutes before you turn on your
device for the first time. If using wired charging it is important to use the USB Type-C™
cable (provided), as other types of USB cables can damage your device.
1Long press the power key until the device vibrates.
2Enter your SIM card PIN if requested, then tap .
3Wait a moment for the device to start.
Your SIM card PIN is initially supplied by your network operator, but you can change it later
from the Settings menu. To correct a mistake made while entering your SIM card PIN, tap
.
To turn o the device
1Long press the power key until the Options menu opens.
2In the Options menu, tap Power o.
It may take a while for the device to shut down.
Why do I need a Google account?
Your Xperia device from Sony runs on the Android platform developed by Google.
A range of Google applications and services is available on your device when you
purchase it, for example, Gmail™, Google Maps™, YouTube™ and the Play Store™.
To get the most out of these services, you need a Google account. For example, a
Google account enables you to do the following:
•Download and install applications from Google Play™.
•Synchronise your email, contacts and calendar using Gmail.
•Chat with friends using the Duo™ application.
•Synchronise your browsing history and bookmarks using the Google Chrome™
web browser.
•Identify yourself as the authorised user after a software repair using Xperia
Companion.
•Remotely find, lock or clear a lost or stolen device using the Find my device
services.
For more information about Android and Google, go to
http://support.google.com
.
It is crucial to remember your Google account user name and password, since in some
situations, you may need it to identify yourself for security reasons. If you fail to give your
Google user name and password in such situations, your device is locked. Also, if you have
more than one Google account, make sure to enter the details for the relevant account.
To set up a Google account on your device
1Find and tap Settings > Users & accounts > Add account > Google.
2Follow the on-screen instructions to create a Google account, or sign in if
you already have an account.
You can also create a Google account using the setup guide when you
device, or go online later and create an account at
https://myaccount.google.com/
first start your
To remove a Google account
1Find and tap Settings > Users & accounts.
2Select the Google account that you want to remove.
3Tap REMOVE ACCOUNT.
4Tap REMOVE ACCOUNT again to confirm.
If you remove your Google account, any security features that are linked to your Google
account will no longer be available.
Your device includes security options, strongly recommended in case of loss or
theft.
When using a security option to protect your device, it is crucial to remember the details
provided at set up.
Screen lock
Set a secure screen lock on your device using a PIN, password, pattern or
fingerprint to prevent others from using your device without permission. Once the
screen lock is set, it is not possible to unlock the screen or erase the content via a
Factory Data Reset without providing the screen lock information.
If you add your contact information on the screen lock, for example your email, this
information can be used to get your device back if you lose it.
Google account
Add a Google account so that you can use the Find my device service. In some
situations, you may also need to identify yourself for security reasons using your
Google account.
Find my device
Use the Find my device service to remotely locate, lock, unlock or erase the content
on a lost device. After you have signed in to your Google account, Find my device
is turned on by default.
SIM card lock
Lock your SIM cards with a PIN to protect your subscription against misuse. The PIN
is required every time you restart your device.
IMEI number
Keep a copy of the IMEI number. If your device is stolen, some network providers
can use this number to stop the device from accessing the network in your country
or region.
Dual SIM devices have two IMEI numbers.
Backup
Back up the content on your device in case your device is damaged, lost or stolen.
Backing up and restoring content
See
on page 42.
Screen lock
When the screen is locked you have to unlock it with a swipe gesture or with your
personal pattern, PIN, password or fingerprint. Initially, the unprotected screen
swipe is set, but it is recommended to use a more secure screen lock to protect
your device.
The security level of each lock type is listed below in order of weakest to strongest:
•Swipe: no protection, but you have quick access to the Home screen.
•Pattern: draw a simple pattern with your finger to unlock your device.
•PIN: enter a numeric PIN of at least four digits to unlock your device.
•Password: enter an alpha-numeric password to unlock your device.
•Fingerprint: place your registered finger on the sensor to unlock your device.
Fingerprints need to be registered with Fingerprint Manager before use. To
configure the notifications on the lock screen, see
Notifications
on page 28.
To create or change a screen lock
It is very important that you remember your screen lock when using a pattern, PIN or
password. If you forget this information, it may not be possible to restore important data
such as contacts and messages. See troubleshooting tips for your device at
http://support.sonymobile.com
.
1Find and tap Settings > Lock screen & security > Screen lock.
2If requested, confirm your current screen lock.
3Choose an option and follow the on-screen instructions.
4When a secure screen lock is used, you can set the power key to lock the
screen, set the screen lock activation time and create a lock screen message
by pressing
If you use a Microsoft Exchange ActiveSync (EAS) account, the EAS security settings may
limit the lock screen type to only a PIN or password. Contact your network administrator to
check the implemented network security policies.
.
Unlocking your device automatically
The Smart Lock feature lets you set your device to unlock automatically in certain
situations, for example, when connected to a Bluetooth device or carrying it with
you.
The Smart Lock feature is available in most markets, countries or regions.
http://www.support.google.com/
Go to
information about the Smart Lock feature.
and search “smart lock” for more
To enable Smart Lock
1Set a pattern, PIN or password as a screen lock if you have not already done
so.
2Find and tap Settings > Lock screen & security > Trust agents.
3Tap the Smart Lock (Google) slider to enable the function.
4Tap
.
5Find and tap Smart Lock.
6Enter your pattern, PIN or password. You need to enter these credentials to
change your Smart Lock settings.
7Select a Smart Lock type.
Fingerprint Manager
Register your fingerprint to use it as an additional security method for unlocking
your device or authenticating purchases. You can register up to 5 fingerprints on
your device.
The pattern, PIN or password screen lock serves as a backup unlock method when
a fingerprint is used as a screen lock. Before registering your fingerprint, make sure
the sensor is clean and without any visible moisture.
To register a fingerprint for the first time
1Find and tap Settings > Lock screen & security > Fingerprint Manager.
2Tap Next. If prompted confirm your pattern, PIN or password, or select your
backup screen lock method and follow the on-screen instructions to set it
up.
3Tap Next and follow the on-screen instructions to complete fingerprint
1Find and tap Settings > Lock screen & security > Fingerprint Manager.
2Confirm your pattern, PIN or password.
3Tap Add fingerprint, then follow the on-screen instructions.
To delete a registered fingerprint
1Find and tap Settings > Lock screen & security > Fingerprint Manager.
2Confirm your pattern, PIN or password.
3Tap the registered fingerprint, then tap DELETE > DELETE.
To rename a registered fingerprint
1Find and tap Settings > Lock screen & security > Fingerprint Manager.
2Select a registered fingerprint in the list, then enter a name and tap OK.
SIM card protection
You can lock and unlock each SIM card that you use in your device with a PIN.
When a SIM card is locked, the subscription linked to the card is protected against
misuse, meaning that you have to enter a PIN every time you start your device.
If you enter the PIN incorrectly too many times, your SIM card will get blocked. You
then need to enter your PUK (Personal Unblocking Key) and a new PIN. Your PIN
and PUK are supplied by your network operator.
To set up a SIM card lock
1Find and tap Settings > Lock screen & security > SIM card lock.
2Dual SIM users, select a SIM card.
3Tap the slider beside Lock SIM card to enable.
4Enter the SIM card PIN and tap OK. The SIM card lock is now active and you
will be prompted to enter your PIN every time you restart your device.
To change the SIM card PIN
1Find and tap Settings > Lock screen & security > SIM card lock.
2Dual SIM users, select a SIM card.
3Tap Change SIM PIN.
4Enter the old SIM card PIN and tap OK.
5Enter the new SIM card PIN and tap OK.
6Re-type the new SIM card PIN and tap OK.
To unlock a blocked SIM card using the PUK code
1Enter the PUK code and tap
2Enter a new PIN code and tap .
3Re-enter the new PIN code and tap .
If you enter an incorrect PUK code too many times, you need to contact your network
operator to get a new SIM card.
.
Using multiple SIM cards
This function only applies for Dual SIM devices.
Dual SIM devices work with either one or two SIM cards inserted. You can get
incoming communication to both SIM cards and select which number to place
outgoing communication from. Before using multiple SIM cards, you need to
enable them and select a SIM card which will handle data trac.
You can forward calls that come in on SIM 1 to SIM 2 when SIM 1 is unreachable,
and vice versa. This function is called Dual SIM reachability. You must enable it
manually. See
1Find and tap Settings > Network & Internet > Dual SIM.
2Tap the SIM1 and SIM2 sliders to enable or disable the SIM cards.
To rename a SIM card
1Find and tap Settings > Network & Internet > Dual SIM.
2Select a SIM card and enter a new name for it.
3Tap OK.
To select which SIM card handles data trac
1Find and tap Settings > Network & Internet > Dual SIM > Mobile data.
2Select the SIM card you want to use for data trac.
For higher data speeds, select the SIM card that supports the fastest mobile network, for
example, LTE.
Finding the IMEI number(s) of your device
Your device has one or two unique identification numbers that are referred to as
IMEI or Product ID. You should keep a copy of this. You may require it if your device
is stolen or when contacting support.
Dual SIM devices only: Your device has two IMEI numbers, one for each SIM card
slot.
To view your IMEI number(s) using the dialpad
1Find and tap
.
2Tap .
3Enter *#06# into the dialpad. The IMEI number(s) are displayed
1Drag out the nano SIM and Memory card tray.
2Drag the strip outwards using your fingernail. The strip displays the IMEI
number(s).
Finding, locking or erasing a lost device
Google oers a location and security web service called Find my device. After you
have signed in to a Google account, Find my device is turned on by default. If you
lose your device, you can use Find my device to:
•Find and show where your device is located on a map.
•Lock your device and present a message on the lock screen.
•Unlock your device and reset it by erasing its content.
•Activate the ringer, even if the sound is turned o.
Your device must be turned on, have an internet connection and have the location
service activated. The Find my device service may not be available in all countries
or regions.
For additional information about Find my device, go to
https://www.support.google.com/
If you erased the content on your device using Find my device, you must enter the
username and password for a Google account in order to use your device again. This can be
any Google account which you have set up on your device as an owner. If you can’t give this
information during the setup, you won’t be able to use your device at all after a reset.
To verify that your device can be found
•Go to
https://www.google.com/android/find
account.
and search for “Find my device”.
and sign in using your Google
Using location services
Location services allow applications such as Maps and the camera to use
information from your mobile or Wi-Fi network as well as Global Positioning
System (GPS) information to determine your approximate location. If you're not
within a clear line of sight to GPS satellites, your device can determine your
location using the Wi-Fi function. And if you're not within range of a network, your
device can determine your location using your mobile network.
In order to use your device to find out where you are, you need to enable location
services.
You may incur data connection charges when you connect to the internet from your device.
To enable or disable location services
•Find and tap Settings > Lock screen & security > Location. Tap the slider to
enable or disable location services.
You can also enable location services from Settings > Google > Location.
To share your real-time Google Location using Google Maps
1Find and tap and sign in to your account.
2Tap > Location Sharing.
3If you are using this feature the first time, tap GET STARTED.
4Select the time span you want to have the function turned on.
5Tap Select People. If prompted, tap ALLOW.
6Select the people you would like to share the location with, then tap Share.
1Find and tap Settings > Lock screen & security > Location.
2Tap Google Location Sharing.
3Select the shared link you want to modify and change the time span as
desired.
4To stop sharing your location, tap Stop sharing.
5To remove the shared link, tap .
Improving GPS accuracy
The first time you use the GPS function in your device, it can take a few minutes for
your location to be found. To help the search, make sure you have a clear view of
the sky. Stand still and don't cover the GPS antenna (the highlighted area in the
image). GPS signals can pass through clouds and plastic, but not through most
solid objects such as buildings and mountains. If your location isn't found after a
few minutes, move to another location.
•Scroll quickly, for example, in a list or on a web page. You can stop the scrolling
movement by tapping the screen.
Turning the screen on or o
When your device is on and left idle for a set period of time, the screen dims and
turns o to save battery power. You can change how long your screen stays active
before it turns o.
When your screen is turned o, your device can be locked or unlocked, depending
on your screen lock setting. See
To turn the screen on or o
•Briefly press the power key.
The screen turns on automatically when you pick up your device, without needing to press
the power key.
To adjust the idle time before the screen turns o
1Find and tap Settings > Display > Sleep.
2Select an option.
Screen lock
on page 12.
Smart backlight control
The smart backlight control keeps the screen on as long as the device is held in
your hand. Once you put down the device, the screen turns o according to your
sleep setting.
To enable or disable the Smart backlight control function
1Find and tap Settings > Display > Smart backlight control.
2Tap the slider to enable or disable the function.
The Home screen is the starting point for using your device. It's similar to the
desktop on a computer screen. The number of Home screen panes is represented
by a series of dots at the lower part of the Home screen. The highlighted dot
shows the pane that is currently displayed.
If Google Assistant is enabled, the Home screen icon appears as in the navigation bar.
To go to the Home screen
•Press
To browse the Home screen
.
Home screen panes
You can add new panes to your Home screen (up to a maximum of twenty panes)
and delete panes. You can also set the pane that you want to use as the main
Home screen pane.
1Touch and hold an empty area on your Home screen until the device
vibrates.
2Flick left or right to browse to the pane that you want to set as your main
Home screen pane, then tap .
When Google Feed is enabled, the left-most pane is reserved for this service and the main
Home screen pane cannot be changed. For more information, see
page 108.
Google Feed
on
To add a pane to your Home screen
1Touch and hold an empty area on your Home screen until the device
vibrates.
2Flick the panes all the way to the right or left, then tap .
When Google Feed is enabled, the left-most pane is reserved for this service and additional
panes cannot be added to the left. For more information, see
Google Feed
on page 108.
To delete a pane from your Home screen
1Touch and hold an empty area on your Home screen until the device
vibrates.
2Flick left or right to browse to the pane that you want to delete, then tap
on the top right corner of the pane.
Home screen settings
You can use the Settings shortcut to adjust some basic Home screen settings. For
example, you can adjust the size of icons on your Home screen.
To adjust the grid size of the screen
1Touch and hold an empty area on your Home screen until the device
vibrates.
2Tap Grid, then select a size.
3Tap APPLY.
To adjust the size of icons on your Home screen
1Touch and hold an empty area on your Home screen until the device
vibrates, then tap
.
2Tap Icon size, then select an option.
Application screen
The Application screen, which you open from the Home screen, contains the
applications that come pre-installed on your device as well as applications that you
download.
To view all applications on the Application screen
1Tap
.
2Flick left or right on the Application screen.
You can also search for recently viewed apps by swiping left from the Application screen.
To enable or disable the recommended apps listings
1Touch and hold an empty area on your Home screen, then tap .
2Tap the App recommendations slider.
To open an application from the Application screen
•When the Application screen is open, flick left or right to find the application,
and then tap the application.
To search for an application from the Application screen
1When the Application screen is open, tap Search.
2Enter the name of the application that you want to search for.
You can also search for applications by swiping right from the Application screen.
To arrange applications on the Application screen
1When the Application screen is open, tap
.
2Tap Sort apps, then select an option.
To add an application shortcut to the Home screen
1On the Application screen, touch and hold an application icon until the
device vibrates, then drag the icon to the top of the screen. The Home
screen opens.
2Drag the icon to the desired location on the Home screen, then release it.
To move an application on the Application screen
1When the Application screen is open, tap
.
2Make sure that Own order is selected under Sort apps.
3Touch and hold the application until the device vibrates, then drag it to the
new location.
Shortcuts for easy actions
You can access shortcuts directly from your app icons to uninstall downloaded
apps or reveal more quick options. For example, long press the Calendar icon to
create a new event or set a reminder. All apps have a shortcut to App info, where
you can adjust notification settings and permissions. You can go to App info by
tapping .
To use shortcuts for easy actions
1Long press the desired app icon on your Home or Application screen.
2Select from the options that appear. For example, tap to go to App info, or
tap to disable or uninstall the application.
If an icon is not shown, tap for more options.
To disable or uninstall an application from the Application screen
Whether an app can be uninstalled or disabled depends on the app, and if it was preinstalled on your device or downloaded. Downloaded apps can be uninstalled. Pre-installed
apps cannot be uninstalled, only disabled if the app supports this. If you disable a preinstalled app, you can enable it again under Settings > Apps & notifications > App info.
1
Touch and hold the application you want to disable or uninstall. If it can be
disabled or uninstalled an
2Tap
> Disable > DISABLE if the app came pre-installed on your device or
appears.
tap > Uninstall > OK if the app was downloaded and you would like to
uninstall it.
icon is not shown, tap for more options.
If an
Navigating applications
You can navigate between applications using the navigation keys and the recently
used applications window, which lets you switch easily between all recently used
applications. The navigation keys are the Back key, the Home key, and the Recent
apps key. You can also pop open two applications on the screen at once using the
split screen mode, if the application supports multi-window function. Some
applications get closed when you press the Home key
paused or continue to run in the background. If an application is paused or
running in the background, you can continue where you left o the next time you
open the application.
1Make sure that the two applications that you want to use in split screen
mode are open and running in the background.
2Open the application that you would like to use in split screen mode, then
long press . The application will be assigned to the first part of the split
screen.
3Select the second desired application from the thumbnail list.
4If you want to resize the split screen windows, drag the split screen border in
the centre.
5To exit split screen mode, long press
displayed.
while the split screen windows are
One-handed mode
Enable one-handed mode to reduce display size so you can type with one hand
more easily. You can adjust the display size as desired.
To enable or disable One-handed mode
1Find and tap Settings > Display > One-handed mode.
2Tap the slider under One-handed mode to enable or disable the function.
3To shrink the screen, swipe across the navigation bar.
4To exit One-handed mode, swipe across the screen or tap an empty area on
the screen.
To adjust the position of the screen
1To move the screen to the left side or to the right side, tap
accordingly.
2To move the screen upwards or downwards, drag the horizontal stripes at
the edge of the resized screen.
3To resize the screen, drag
at the edge of the resized screen.
or
Widgets
Widgets are small applications that you can use directly on your Home screen.
They also function as shortcuts. For example, the Weather widget allows you to
see basic weather information directly on your Home screen. When you tap the
widget, the full Weather application opens. You can download additional widgets
from Google Play.
To add a widget to the Home screen
1Touch and hold any empty area on your Home screen until the device
vibrates, then tap Widgets.
2Find and tap the widget that you want to add.
To resize a widget
1Touch and hold a widget until the device vibrates, then release it.
2If the widget can be resized, the Resize option appears. For example, the
Calendar widget is one that can be resized.
3Tap Resize and drag the dots to shrink or expand the widget.
4To confirm the new size, tap anywhere on the Home screen.
To move a widget
•Touch and hold the widget until the device vibrates, then drag it to the new
location.
To remove a widget
•Touch and hold the widget until the device vibrates, then drag it to Remove
Your device comes with a default background, but you can adapt the Home screen
and lock screen to your own style using wallpapers and themes featuring dierent
colours and patterns.
A wallpaper may be used without changing any of the other elements of your
Home screen and lock screen. Live wallpapers add visual eects to your
interactions with the touchscreen, letting the display change dynamically.
Themes can include a wallpaper, a screensaver, title bars, and a sound scheme
that all fit together to create a unique look and feel for your device.
To change your wallpaper
1Touch and hold any empty area on your Home screen until the device
vibrates.
2Tap Wallpapers.
3To set the same wallpaper for the Lock and Home screens, select the
wallpaper and tap APPLY. To set dierent wallpapers, first tap the Lock or
Home screen preview. Choose a wallpaper for that screen and tap SELECT >
APPLY.
You can also use a photo as your wallpaper. Instead of selecting a wallpaper from the
options shown, tap Photos. Choose a photo and tap SELECT > APPLY.
To set a theme
1Touch and hold an empty area on your Home screen until the device
vibrates.
2Tap Themes.
3Choose an option:
•To use an existing theme, select the theme, then tap APPLY THEME.
•To download a new theme, tap GET MORE THEMES.
When you change a theme, the background also changes in some applications.
Taking a screenshot
You can capture still images of any screen on your device as a screenshot.
Screenshots you take are automatically saved in the Album application.
To take a screenshot
1Long press the power key until a prompt window appears.
2Tap
1Double-tap the status bar to display the Notification panel.
2Tap the screenshot.
.
You can also take a screenshot by pressing and holding the power key and volume down
key at the same time.
To view your screenshot
Notifications
Notifications inform you of events such as new messages and calendar
notifications as well as activities in progress such as file downloads. Notifications
You won't get any notifications on the lock screen.
Get all notifications on the lock screen. When you have this setting turned on,
keep in mind that all content (including the content of incoming emails and chat
messages) will be visible on your lock screen unless you designate the relevant
apps as Hide sensitive content in the Apps & notifications settings menu.
You must have a PIN, password, or pattern set up as your screen lock in order
for this setting to be available. Contents hidden is displayed on the lock screen
when sensitive notifications arrive. For example, you'll get a notification for an
incoming email or chat, but the content won't be visible on your lock screen.
To select the notifications to display on the lock screen
1Find and tap Settings > Apps & notifications > Configure notifications.
2Tap Show notifications.
3Select an option.
You can keep notifications on the lock screen until you swipe to dismiss them. To enable
this feature, tap the Keep notifications slider under Configurenotifications.
Setting the notification level for an app
notification dotShow notification dots.
Allow
Allow soundAllow all notifications from the selected app.
Show notificationsShow or hide all notification content on the lock screen.
Interrupts in Priority only Receive notifications from this app even when Do not disturb is set to
You can set notification channels to categorise notification levels. Long press a notification
to change the notification categories.
Priority only.
To set the notification level for an app
1Find and tap Settings > Apps & notifications > App info.
2Select the desired app, then tap App notifications.
3Tap the sliders to adjust notification settings as desired.
Notification light
The notification light informs you about battery status and some other events. For
example, a flashing white light means there is a new message or a missed call. The
notification light is enabled by default but can be disabled manually.
When the
warning, for example, when the battery level goes below 15 percent.
notification light is disabled, it only lights up when there is a battery status