TC55 Operating System GMS and Non-GMS BSP Hotfix CFE 4.0 Release Notes


SPR26380 -­ TC55 JB -­Corrupted audio I/O when audio control returns to the app after finish phone call


The TC55 emits a high pitched metallic noise of high volume if the device audio control switches between phone and another application which is using Audiomanager.STREAM_VOICE_CALL on an audio track. Device can emit a loud noise or the audio is lost completely in such scenario.

Contents -­ OTA package for GMS device -­ OTA package for non­GMS device

Device Compatibility

This software release has been approved for use with the following Symbol devices.


Operating System


Android 4.1.2  JB

Installation Requirements

This SW is intended for the TC55 device running non­GMS/GMS build only

Installation Instructions

OS Recovery Update:

1.      Connect the USB cable from your PC to the device and enable USB mass storage mode on the device.

2.      On your PC you should see an internal and external USB mass storage drive (SD card) appears in the File Explorer and copy the recovery update zip file to any storage.

3.      Press and hold on the device the Power button, Scan/Action button and Vol+ button until the screen is turned OFF.

4.      Release the Power and Scan/Action buttons and continue to hold Vol+ button.

5.      The device should enter to Recovery update mode.

6.      Release Vol+.

7.      Click on Vol+ or Vol­ to navigate and select appropriated storage.

8.      Click on Scan/Action button to select the option.

9.      Click on Vol+ or Vol­ to navigate to the recovery update zip file.

10.    Click Scan/Action button to select the recovery update zip file.

11.    Device will automatically reboot and will be ready to use.

Part Number and Release Date

February, 2014