GLOBUL 3G USB Modem
User Manual
2
Contents
1 Modem Introduction ..................................... 4
1.1 Introduction ....................................................... 4
1.2 Warning and Notice ............................................. 4
1.3 Applicability Scope .............................................. 6
1.4 System requirements .......................................... 6
1.5 Functions ........................................................... 6
1.6 Specification ....................................................... 6
1.7 LED indications ................................................... 8
2 Installation ................................................... 9
2.1 Outline and Parts ................................................ 9
2.2 Hardware Installation ........................................ 10
2.3 Software Installation ......................................... 12
2.4 Run the Application Software .............................. 19
2.5 Hardware Uninstall ............................................ 19
2.6 Software Uninstall ............................................. 20
3 Functions & Operation ................................ 22
3.1 Interface introduction ........................................ 22
3.1.1 Main Interface ............................... 22
3.1.2 Description of Mini Icons ................. 25
3.2 Connecting Internet ........................................... 27
3.3 SMS ................................................................ 30
3.3.1 Read Short Message ....................... 32
3.3.2 Create new message ...................... 32
3.3.3 Operating Guide ............................. 34
3.4 PhoneBook ....................................................... 36
3.4.1 Creating a new contact ................... 36
3.4.2 Modifying contacts ......................... 37
3.4.3 Deleting contacts ........................... 37
3
3.4.4 Sending SMS to a contact................ 37
3.4.5 Searching for a contact ................... 38
3.5 Settings ........................................................... 38
3.5.1 Connection Settings ....................... 39
3.5.2 Security Settings ........................... 41
3.5.3 Network Settings ........................... 42
3.5.4 Message Settings ........................... 46
3.5.5 Alert settings ................................. 47
3.6 MicroSDHC card ................................................ 47
4 FAQ & Answers ........................................... 49
4
1 Modem Introduction
1.1 Introduction
Thank you for using ZTE MF637 USB Modem.
To guarantee the modem always in its best condition,
please read this manual carefully and keep it for further
use.
The pictures, symbols and contents in this manual are
just for your reference. They might not be completely
identical with your modem. We operate a policy of
continuous development. We reserve the right to update
the technical specifications in this document at any time
without prior notice.
The ZTE MF637 USB modem is a multi-mode 3G USB
modem, working in
HSUPA/HSDPA/UMTS/EDGE/GPRS/GSM networks. With
USB interface connecting to a laptop or a desktop PC, it
integrates the functionality of a modem and a mobile
phone (SMS), and combines mobile communication with
Internet perfectly. It supports data and SMS services
through the mobile phone network, enabling you to
communicate anytime and anywhere.
1.2 Warning and Notice
To the owner
Some electronic devices are susceptible to
electromagnetic interference sent by modem if
inadequately shielded, such as electronic system of
vehicles. Please consult the manufacturer of the device
before using the modem if necessary.
5
Operating of laptop and desktop PC and modem may
interfere with medical devices like hearing aids and
pacemakers. Please always keep them more than 20
centimeters away from such medical devices when
they are turned on. Turn the modem off if necessary.
Consult a physician or the manufacturer of the medical
device before using the modem.
Be aware of the usage limitation when using a modem
at places such as oil warehouses or chemical factories,
where there are explosive gases or explosive products
being processed. Therefore, turn off your modem if
required.
Don’t touch the inner antenna area if not necessary.
Otherwise it will affect your modem’s performance.
Store the modem out of the reach of little children. The
modem may cause injury if used as a toy.
Modem
Please use original accessories or accessories that are
authorized. Using any unauthorized accessories may
affect your modem’s performance, and violate related
national regulations about telecom terminals.
Avoid using the modem near metallic structure device
or establishment that can emit electromagnet wave.
Otherwise it may influence receiving signals.
The modem is non-waterproof type, please keep it dry
and store in shady and cool place.
Don’t use the modem immediately after a sudden
temperature change. In such case, it will produce dew
inside and outside the modem, so don’t use it until it
becomes dry.
Take the modem carefully. Don’t lose, bend or cause it
struck. Otherwise it will lead to destruct damage.
No dismantling by non-professional and only qualified
maintainer can undertake repair work.
6
1.3 Applicability Scope
Interface
Networks
Dimension
85.6mm×26.0mm×11.5mm
Weight
About
24g
HSUPA 5.76
Mbps
UL
HSDPA 7.2
Mbps
DL
WCDMA 384 Kbps
M
emory card
Support upto 4GB MicroSD
HC capacity
Temperature
0ºC ~ +55ºC
ZTE MF637 USB Modem supports the present
mainstream types of laptops and desktop PCs, such as
HP, IBM, Toshiba, Lenovo, Dell, Sony, etc.
1.4 System requirements
Operating System：Windows 2000 / XP / Vista
Configuration (Recommended):
CPU 1GHz Pentium or above
Hard Disk 50M or above
RAM 512M or above
The performance of the modem may be influenced if
configuration is under the recommended requirement.
1.5 Functions
Functions: SMS service, data service, applied
management, data concurrence, support MicroSDHC
card etc.
1.6 Specification
type
standards
Data Rate
USB
HSDPA/HSUPA/UMTS/GSM/GPRS/EDGE
7
8
1.7 LED indications
In the USB Modem there is a multi-colour-LED (light),
which shows the status of the modem via different colours
and flash-signalling. In this table below an explanation is
given of all different situations:
Indicator Modem status
Orange Not detecting any network
Red always on Roaming status
Red blinking Active connection when roaming
Green always on Attached to 2G network
Green blinking Active connection via 2G network
Blue always on Attached to 3G network
Blue blinking Active connection 3G network
9
2 Installation
2.1 Outline and Parts
The following figure shows the appearance of the MF637.
It is only for your reference. The actual product may be
different.
1
5
2
.
○,1 SIM/USIM card slot
It is where you insert the subscriber identity
module/UMTS subscriber identity module (SIM/USIM)
card.
○,2 Memory card slot (MicroSDHC card)
It is where you insert memory card (MicroSDHC card).
○,3 USB port
Connect your modem to the laptop or desktop computer.
○,4 Modem cap
It protects your modem USB port when it is not used.
○,5 Indicator
It indicates your modem status.
4
3
2.2 Hardware Installation
1. Insert the SIM/USIM card into the USB Modem:
First, you should insert your USIM/SIM card into the USB
Modem, and confirm that your SIM/USIM card support
data service, GPRS, EDGE, UMTS, HSDPA or HSUPA etc.
If you have questions on this, please consult your service
supplier.
To install SIM/USIM card
First take down the modem cap, then the USB
connector is visible.
Pull out the plastic socket above the USB connector.
Note: Do not pull the socket rudely for the socket is fixed
with the modem. Otherwise the socket will get damaged.
Insert the SIM/USIM card with the metal contact
area facing downwards into the socket.
10
Insert the plastic socket into the modem. You can
hear a click when the SIM/USIM card locks in place.
To Remove the SIM/USIM card from the USB modem
Take down the modem cap.
Pull the plastic socket slightly, and you can hear a
click when the USIM/SIM card gets unlocked.
Take out the SIM/USIM card.
Insert the socket into the modem.
2. Install the MicroSDHC card into the USB modem:
You can use a compatible MicroSDHC card to save more
data. Only MicroSDHC card is supported by the modem
and do not use other memory card in the modem.
Install MicroSDHC card in the USB Modem, if you want to
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use it.
Open the MicroSDHC card cover. Insert the MicroSDHC
card into the memory card slot. Make sure the metal
contact side of the memory card facing downwards,
shown as the following picture.
Then close the memory card slot cover.
Note: The modem supports up to 4GB MicroSDHC card.
3. Connect the USB Modem to your laptop or
desktop PC:
Plug the USB modem into your computer’s USB port
and make sure that it is tightly inserted.
The OS automatically detects and recognizes new
hardware and starts the installation wizard.
2.3 Software Installation
The system will automatically detect and recognize the
12
new hardware and display the new icon in the desktop
status bar, indicating that the computer and the USB
Modem have been connected properly. After a few
seconds, there will show the following installation
interface.
Note: If the system does not launch installation
automatically, you can run the installation program in
path of My Computer > GLOBUL MODEM >
AutoRun.exe.
The following installation interface will show how to
install the software.
Recommend you to exit other programs, and then
13
click “Next”.
Read the agreement carefully. If you agree, choose
“I accept the terms of the license agreement”, and
then click “Next”.
14
Select the folder that you want to install the software
by pressing “Change”, and then click “Next”.
15
The system show the installation progress, wait a
minute and the following screen will show up:
16
17
Click “Finish” to complete the installation.
Note
：：：：
If you have problems with installation after the
upper operation, please contact the service provider.
After the installation, select the “Start → Programs”
and there will be a “
program group，which includes “
Manager
” and “Uninstall”. There will be a Shortcut icon
GLOBUL Connection Manager
GLOBUL Connection
”
like below on the desktop.
18
2.4 Run the Application Software
After the modem is correctly connected, click the “Start
→ Programs →
Connection Manager
to run the application software.
Or double click the shortcut icon, to run the application
software.
GLOBUL Connection Manager → GLOBUL
” menu on the laptop or desktop PC
After modem initialized, main interface appears. When
the standby icon appears in the taskbar, the modem
can work properly.
2.5 Hardware Uninstall
Close the software application then remove the hardware
following the procedure below.
Firstly click the “close” button on the menu, and
then click “OK” to close the software.
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Then remove your USB Modem safely.
When you use a MicroSDHC card in the modem:
Please left click the icon in the Windows system
tray bar. Then a menu will popup and indicates the
USB devices list as below:
Select “Safely remove the USB disk” which is
relevant to the MicroSDHC card.
Pull out the USB modem directly, if you want to
disconnect the modem from the laptop or desktop
PC.
2.6 Software Uninstall
Close the application program before the software
uninstalls.
Click “
Connection Manager ->Uninstall
laptop or desktop PC.
Start-> Programs-> GLOBUL
” menu on the
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Click “Yes” according to the indication, then the
system begins to uninstall programs.
Click “Finish” to complete the application software
uninstall.
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3 Functions & Operation
3.1 Interface introduction
3.1.1 Main Interface
The starting screen of the USB Modem software is shown
as the following:
The whole interface is divided into three parts. Related
functions can be executed by operation in the related
areas.
1. Function button area:
There will show various function button icons. Select
different function button and it will carry out
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corresponding operation.
Internet: Connect to the Internet.
Short Message (SMS): Send SMS or read SMS.
PhoneBook: Save and view the different
information of the contacts.
Settings: Set normal relative information for the
modem.
Help: Show the help information.
2. System information area:
Show the system status and different kinds of tips.
Icon
Explanations
The icon indicates the network
signal intensity. There are 6
stages from none to the
strongest.
The icon indicates there are
new SMS at present.
The icon indicates the current
status of Internet connection is
not connected.
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Icon
Explanations
The icon indicates the current
status of Internet connection is
already connected.
Letter “P” means supporting
packet-switch
letter “C” means supporting
（P）
service,
circuit-switch（C）service.
roaming.
The icon indicates insert status
of the modem. Green means it
SIM/USIM card is in status of
has been inserted into the
computer.
The icon indicates insert status
of the modem. Red means it
has not been inserted into the
computer.
The icon indicates insert status
of the modem. Yellow means
it has been inserted into the
computer but in offline status.
The icon indicates insert status
of the SIM/USIM card to the
modem. Green means the card
has been inserted.
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Icon
Explanations
The icon indicates insert status
of the SIM/USIM card to the
modem. Red means it has not
been inserted.
The icon indicates the current
network type, i.e. GPRS or
HSDPA/HSUPA service.
Name of the current service
provider.
View related information for
your internet operation, such
as, user name, start time,
disconnect time, duration, data
received and data sent.
3. User Area:
Show the man-computer interaction information under
various conditions.
3.1.2 Description of Mini Icons
When click the mini button, the software will minimize as
an icon on the system taskbar. If connected to the
Internet, the minimized software won’t influence the
download of data or receiving SMS. When the application
window is minimized, the system icons will display on the
taskbar. Double click the icon to resize the display.
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1. Taskbar Icons Description：
The USB Modem has been inserted into the
computer.
The USB Modem is not inserted into the
computer.
The USB Modem is offline.
UIM/SIM card is not inserted.
No network signal.
There is a new message.
The USB Modem is ready to connect to Internet.
The Internet is already connected.
2. The uses of Tray Icons：
Right Click the tray icons, the following menu will appear:
Device Offline/ Device Online: Pause/reusing the
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working of the modem. If connected Internet, you need
disconnect the Internet first, and then select the Device
Offline.
Factory Settings: Restore all the settings to the original
values in the USB modem. This operation just affects the
settings in the USB modem and do not change any
software settings in the laptop or desktop PC.
Help: Enter the USB modem software help.
About: View the information of the application software
and hardware versions.
Exit: Close the software and stop the modem from
working.
3.2 Connecting Internet
You can browse web pages after you have accessed to
Internet with the help of modem, you can also receive
SMS when surfing in the Internet.
1. Connect to the Internet:
Click the Internet icon. Then the system will ask you
“Connect to ?”. Select “Connect”.
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When connected, there is a status bar in the bottom of
the user area which shows “State: connected to …”, and
the user area will show data amount, connected time and
so on. Then you can access Internet and receive email
etc through network.
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You can click “Disconnect” to stop the connection when
the “Connect” 'button becomes “Disconnect” button,
2. Internet connection records:
Click “Internet connection records”
to check the log of Internet
connection history.
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3.3 SMS
Note: To ensure that the Short Message can be used
properly, at first, you should setup the correct Short
Message center number. Refer to section “3.5.4
Message Settings”.
Click the “Short Message” icon to switch to the SMS
interface and it will show the number of messages in the
inbox, outbox and draftbox. The user can click icons of
“InBox”, “OutBox”, “DraftBox” and “New Message”
to enter relative interface.
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InBox: Save the received messages.
OutBox: Save the successfully sent messages.
DraftBox: Save the editing SMS which haven’t been sent.
The drafts can only be saved in computer, not USIM/SIM.
New Message: Write a new message.
For example: “Message in InBox PC : 2 Item(s) (U)SIM
Card: 1 Item(s)” means: The PC side has 2 short
messages and there is 1 short message in the Inbox of
the SIM card , “(U)SIM Card capability:40Item(s)” means
the SIM card can hold 40 short messages.Different
SIM/USIM cards will have different capacities. The
modem will show the capacity automatically in usage,
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like the above “40”. For more information, please consult
your supplier.
3.3.1 Read Short Message
Click the “Inbox” button on the main interface or click
new message icon on the system taskbar to read the SMS
saved in the box.
You can use the buttons under the menu to execute
reading, forwarding, deleting, saving contact functions
and so on.
3.3.2 Create new message
Click “New Message” button to input the recipient’s
number and message content.
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The recipient’s number can be input directly or by
entering the phonebook to select one/more/group
records.
The recipient’s amount can be one or more. Please use
“;” to separate recipients.
The SMS content can include 160 individual English
characters (including English symbols). There will show
total characters on the interface.
Click “Send”, the prompt screen like bellow will appear
on the interface.
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Select “Yes”, and then the edited short messages will be
sent.
After sent successfully, the SMS will be saved into outbox
automatically. If send fails, it will be saved to the draft
box automatically.
Send SMS while browse the web:
When surfing the Internet, if your network supports, you
can send short messages at the same time. Click “Short
Message” button icon, enter the short message
interface to send short messages normally.
3.3.3 Operating Guide
Enter any of the InBox/OutBox/DraftBox to execute
the following functions:
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Read: Read all the information of short messages. (The
content of short messages, sender’s phone number,
delivered date and time)
Reply: Reply short messages to the sender (Can’t be
executed in OutBox / DraftBox).
Forward: Send the short message to other recipients
(Can’t be executed in DraftBox)..
Move: Change the saving location of short messages
between PC or USIM/SIM card (Can’t be executed in
DraftBox).
Delete: Delete the selected short messages.
Save: Save sender’s number into the phonebook.
Cancel: Return to the SMS interface.
35
Make use of “Ctrl”or “Shift”key and click to choose
several messages to execute simultaneously.
New message can not be received when the USIM/SIM
card is full of short messages (Different USIM/SIM cards
have different capacities). While new message can not be
saved, the system will indicate the inbox is full and
prompt user to clear the inbox at USIM/SIM card side.
3.4 PhoneBook
Click the ”PhoneBook” icon to access to the phonebook
window, the phonebook information can be saved in the
PC or SIM/USIM card and you can choose the save
position. Each record includes contact name, mobile
phone number, home phone number, office phone
number, email and the group name which it belongs to.
3.4.1 Creating a new contact
1) Click New → New Contact.
2) Select Save position to decide where you want to
save your contact, PC or (U)SIM card.
3) Input the name, phone number, Email address, etc.
Then click OK.
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3.4.2 Modifying contacts
1) Select a contact and then double-click it or click
“Edit”.
2) After the modification, click “OK”.
3.4.3 Deleting contacts
1) Select one or more contacts and then click “Delete”.
2) At the prompt, click “Yes”.
3.4.4 Sending SMS to a contact
1) Select one or more contacts and then click “SMS”.
2) You will access in the writing SMS window
automatically, the selected contact mobile phone
numbers will be listed in the receiver column.
3) Enter the contents of the message and then click
37
“Send”.
4) At the prompt, click “Yes” to send the SMS.
3.4.5 Searching for a contact
1) Enter the search conditions in the search condition
blank.
2) Click Search begin searching.
3) The searching results will display in the contacts
window.
3.5 Settings
Click “Settings” icon to switch to the settings interface.
It includes: Connection settings, Security settings,
Network settings, Message settings, Alert settings.
Note: all the necessary settings have been correctly
saved in your USB modem. There is no need to change
these default settings.
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3.5.1 Connection Settings
To ensure that the modem can connect the Internet
properly, you should configure the connection
information first.
1. Button description
Add: Add new configuration file.
Delete: Delete the selected configuration file.
Edit: Edit the selected configuration file.
Set default: Select one configuration file from the list,
and set it as the current using files.
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2. Config File
Click “Add” to add new connection information to the
system. The “Config File” interface will appear:
The configuration information includes: Config Filename,
Dial Number, User name, Password, APN, DNS, and PDP
address. If network supports “Obtain server address
automatically”, the modem can obtain the assigned IP
information automatically. If network does not support it,
you should input the proper address manually. Please
consult the network supplier of SIM/USIM card for all
above information. The configuration information may be
various according to the different network suppliers and
network types.
40
3.5.2 Security Settings
1. Enable the PIN Code
When “PIN enable” item is selected, please enter PIN
code to use the modem and you can click “Change PIN”
to modify the number.
2. Backup Phonebook, Internet connection records and
SMS of PC
Click “Backup” to backup the Phonebook, SMS and
Internet connection records in PC.
Click “Resume” to restore the backup data.
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3.5.3 Network Settings
1. Select Network
Automatic: The system selects the network
automatically by the user’s selected rules and the
network status.
Manual: The network is selected by users themselves.
2. Network Mode Select
Automatic: The system will search valid network
automatically.
UMTS Only: The system will only search UMTS network.
GSM Only: The system will only search GSM network.
42
43
3. Manual Select
When the “Manual” is selected, click the “Apply” button,
pop-up the following window:
Wait a minute, the supplier list will show in the window
and the suppliers with the blue or green icon can be
selected. Select a proper network to connect.
44
Select the network that the supplier is utilized to serve
your USIM/SIM and press “Select” to attach the
network.
45
3.5.4 Message Settings
Message Center: Set the corresponding SMS center
number. You must input the correct SMS center number
to use the SMS properly and the number will be provided
by the network supplier. Please enter the country code
before the number.
Validity period: Set the time limit for saving SMS in the
network side. (This function needs network supports.)In
option：12 hours/A day/A week/The longest period. The
default setting is the longest period permitted by the
network.
Location of Saving New SMS: Select “Default” to save
in location set by network. Select “(U)SIM Card” to save
in USIM/SIM card; select “PC” to save in laptop or
desktop PC.
46
Delivery Report: Set as “Turn On” or “Turn Off”. When
it is set as “Turn On”, the network will inform you of the
status for the sent messages.
3.5.5 Alert settings
You can set “Connect alert, Disconnect alert and
Incoming SMS alert” by yourself. These alerts will sound
on the PC side. The audio file supports MP3、WAV、WMA
and MIDI format. If you select “Mute”, you cannot hear
corresponding alert.
3.6 MicroSDHC card
If you use MicroSDHC card in your modem, your
47
computer will display a removable disk related to the
microSDHC card. You can use this disk freely as you
want.
If you want to pull out the modem, please uninstall the
removable disk first. For more details, please refer to
section “Hardware Uninstall”.
3.7 Help
Click “Help” icon, and switch to the help interface. Under
the help topic, you can get the USB Modem information
about function introductions, installation and usage
guide, etc
48
4 FAQ & Answers
Problem
Possible
Problem
The system can
The system
Open the visual
After the full
The system
Ple
ase install the
When you meet the following problems in service, please
refer to the following answers to solve it. If the problems
still exist, please contact with your service supplier.
Description
not run the
installation
program
automatically.
installation, the
system doesn’t
install the
driver program
properly.
Causes
configuration is
not suitable for
the auto run.
configuration is
not suitable for
the auto run.
Solving
disc of the
modem program
and start the
autorun.exe.
If you have
installed the
other version of
installation
program please
uninstall it firstly.
driver program
manually. The
driver program
can be found in
the installation
location:
C:\Program Files\
MODEM Mobile
Connection\drive
rs
49
Problem
Description
Possible
Problem
The ZTE
The
Run the
After
the
The system
Please open the
After restarted
1. The position of
1．Adjust the
2．You are
in the
2. Change to the
Causes
Solving
application
software can
not run
normally
modem is
plugged in, the
modem
program
doesn’t run
automatically.
the computer,
there is no
signal.
configurations
have some
errors.
configuration is
not proper.
the USB Modem
inner antenna is
unfitting.
place where no
GSM/GPRS/EDGE
/UMTS/HSDPA/H
SUPA network
covered , such as
underground
parking lot,
tunnel etc.
installation
again. Select
Modify or
Repair to correct
the errors.
modem program
manually. You
can find it in the
Start→ Program
menu or the
shortcut on the
desktop.
angle and
position of the
USB Modem.
places where the
signal is in good
condition.
50
Problem
Description
Possible
Problem
When the USB
1. The
1.
Run the
2. The modem
2. Restart the
3. The
U
SIM
/SIM
3. Insert the
Message sent
1. The SMS
1. Consult
your
2. The network is
2. Try later.
Causes
Solving
Modem has
been plugged
in, computer
cannot find the
USB Modem.
failed.
installation
programs of the
USB Modem
haven’t been
installed
properly.
isn’t inserted
well.
card isn’t
inserted well,
such as inserted
in reverse.
center number
isn’t correct.
busy and other
reasons.
installation
program first
then connect the
device. Now
install the drivers
as normal in
Windows.
computer, or
insert the modem
again.
USIM/SIM card
correctly again.
service provider
for the correct
number. Then
configure the
right number in
Message
settings.
51
Problem
Description
Possible
Problem
Date
1. You are in
1. Change to the
2. The network at
2. Try later.
3. The APN in the
3. Check the APN
4. The modem
4. It is perhaps
5. The network
5. Select the
Causes
Solving
connection
failed.
the place where
no
GSM/GPRS/EDGE
/UMTS/HSDPA/H
SUPA network
covered， such as
underground
parking lot,
tunnel etc.
this time in this
place is busy
now.
configuration
files is error.
data is error.
place where
there is good
signal.
in the
configuration file
in the
“Connection
settings”.
the GPRS or
UMTS network
problem and
please contact
with the local
supplier in time.
type selected by
manual is wrong.
correct network
according to the
type of the
USIM/SIM card.
52
Problem
Description
Possible
Problem
Connected to
1. After
1. Check that the
2. The IE browser
2. If the IE gets
3. The operating
3. Use the
Causes
Solving
the Internet,
but it cannot
open any
website page.
connection, there
is no data
transfer, which
resulted that you
can not open web
pages.
got problems.
system is
infected by virus
(Such as Worm
Blaster which can
take up a
quantity of
upload data flow
and result that it
can’t receive
downloaded data
flow so that you
cannot open any
website.)
APN in the
Configuration
files is correct or
not.
problems,
upgrade to the
new version or
reinstall the IE
browser.
professional
anti-virus
software to check
and kill the virus
in the operating
system
completely.
53
Problem
Description
Possible
Problem
4. You have
4. Consult
your
The Modem can
Your USB Modem
Con
sult your
No warning
1.
No audio card
1.
Check the
2.
If you select
2.
Check the Alert
My MicroSD
HC
Check the
Use another
Causes
Solving
not connect to
the Internet in
other places
tone
card can not
read or not
found
connected to
other APN. which
cannot connect to
the
Internet.
is not permitted
to roam in your
network.
is fixed in
computer or the
volume is too
small.
“Mute”, you
cannot hear
corresponding
alert.
MicroSDHC card
capacity, the
maximum
supported
capacity is 4GB
service supplier
for help.
service supplier
for help.
audio card and
adjust the
volume properly.
Settings to make
sure the “Mute” is
not selected.
MicroSDHC card
with a maximum
capacity of 4GB
54
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