Zebra TC75X -> How Remove life guard ?

Hello all,

I have device Zebra TC75X under android 6.
I have updated this device to android 7 to make some test.
After , I have installed the life guard with date september 2019 (last).

Install ok, but actually it's not possible to re install the OS android 6 on this device
each time, I try with stage now to re install OS android 6 I receive a screen ok but the device still on android 7 with life guard installed september installed !

How i can re install my android 6 on this device ?
I've try a factory reset / entreprise reset also but nothing work at all ...

I can't understand ..

HELP HELP HELP HELP

I'm still block because I need to setup to android 6 for to continue my investigation ...

Thanks for all

Darryn Campbell
Hi,I have never tried this

Hi,

I have never tried this specifically but I believe the process would be:

There are instructions in the release notes which include a note about downgrading: https://www.zebra.com/content/dam/zebra_new_ia/en-us/software/operating-system/tc5x-tc7x-shared-operating-system/tc5x-tc7x-v01-49-00-gms-release-notes.pdf

Please be aware you will lose ALL data on your device

Also, if you haven't already done so it is best practice to remove any Google gmail accounts from the device prior to doing this to avoid Factory Reset Protection.

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christophe bernard
Hello darryn,

Hello darryn,

thanks a lot for this explanation but that's doesn"t work for me !
If i start adb reboot recovry -> device reboot just !

I've try to install all in the sdcard and press left button and power until the android screen.
After I have the reboot recovry who comes.

I've try to install OS 6 / factory reset / entreprise reset / ...

reboot the device but it's still on android 7 with life guard on septembre 2019

I've open a ticket support I hope they can find a solution ..
Pretty boring actually ..

Have a nice wkend

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christophe bernard
Hello darryn,

Hello darryn,

that's works :)
I think when i'm trying I was on mode ...not really wake up !

Now i can re install OS 6 without problem even same the patch lifeguard is install ...

Thanks for the time you spend here

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Darryn Campbell
Fantastic, I am glad it is

Fantastic, I am glad it is now working

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