Zebra TC20, TC25 User Manual

Android O OS Update

Instruction for Family

of Products TC20 and

TC25 (GMS).

Installation Requirements

• Zebra Android USB Driver V2.2 or higher

• Android Debug Bridge (ADB) version 1.0.39 or higher

• TC20/TC25 GMS Android OS Release Images

Installation Instructions

Using the “adb sideload” method

Assumptions

1. ADB installed on PC

2. TC20/TC25 has Developer options enabled

3. USB debugging ON

Procedure

1. Plug the TC20/TC25 into the USB & Charging Cable and then the Cable to the PC. If you have a
Cradle with USB connectivity, connect it now.

2. You may need to pull down notification bar, and tap on the notification which says, “USB charging
this device”, and change it to “Transfer files”.

3. Open Command Prompt on PC, run “adb devices” and check to see if you can see the device’s

serial number… If yes, proceed… if not you will need to get the PC set up with the proper drivers

or install an External SD Card.

4. You may also get a pop up on your PC (Win 7) that you will be connected as a Portable Media
Player… this can be ignored.

5. Entering Recovery Mode

a. Choice 1: In Command Prompt, type “adb reboot recovery” and click enter.
b. Choice 2:

i. Reboot and hold PTT key

ii. When Zebra Technologies logo appears on the screen Release the PTT Key

6. Your TC20/TC25 will reboot and take you to Android Recovery screen.

7. To select Sideload Method

a. Use the Volume + and – to highlight, “Apply upgrade from ADB” and press the Power

Key to select it

8. With your Command Prompt, open, type “adb sideload” and add a space and then drag and drop
the zip file which you want to apply to the device and press enter.

a. When the file download starts, the command window will show progress with a

percentage completed.

b. Device display will show a series of messages indicating it is downloading, verifying and

installing the image on to the device.

9. After successful update, the device will auto reboot and you see Zebra on top and POWERED BY
android at the bottom and after about 10 second will transition to the TC20/TC25 Touch
Computer splash screen with 5 dancing white dots at bottom… it will stay at this screen for up to
4 minutes and then present the “Welcome Screen”.