A friend of mine gave me her Liquid MT to help her regain access to the phone.
The phone is manufactured Oct. 2011 and still has stock GB. It's not rooted, no CWM, USB debugging is not switched on.
The phone halts on startup. The lockscreen is partially there but fails to load to completion. There's no pin verification, no reaction to any touch event and thus no access to the homescreen. Even the buttons don't work properly. For instance you can't power down the phone cause long-press-power-button doesn't work. It sits there totally unaccessible.
I can boot into recovery however. Wiping cache didn't help.
My friend is very reluctant to let me perform a hard reset, as having never made a backup or synced with Google Mail, she doesn't want to loose her contacts and messages. <_<
Last resort is updating the fw through recovery "apply sdcard: update.zip".
I'm not familiar with updating ROMs and don't even know, if this is possible. If so, I guess this will only work with official ROMs.
I was looking for fw at ACER website and was offered "OS_Acer_4.000.13.EMEA.CUS7_A23G_A.zip".
I'm a little confused, because there is no mention of a CUS7 fw on this forum. Only GENs.
Updating this fw through recovery failed. I renamed it to update.zip and put it into root. Got "E: signature verification failed".
The package contains Windows files (*.msi, setup.exe, *.pdf, NetFramework). So I guess this isn't updateable through recovery anyway.
1.) confirm that I may update fw through recovery
2.) point me to right fw file (german)
3.) help me out in any other way
Thank you very much in advance!!