Help with Factory Reset / New PIN entered and forgotten (xperia T)

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danarama

Senior Member
Aug 22, 2010
31,278
18,811
Oxenhope, West Yorkshire, UK
Hi Folks,

I'm wondering if you could help me please? I myself am pretty familiar with Android, but my missus has an Xperia T which is very alien to me. For instance, finding it has no stock recovery confuses me massively.

We wiped the phone whilst troubleshooting a speaker issue. Once it was set up again, she wanted to change the lockscreen photo. I advised it was probably in the Security menu. I didn't realise this, but she had never known it had PIN lock built in, so she decided to set it and promptly forgot it.

I have been searching the internet for a solution as well as Q&A here. I found in the sticky threads that I could reset it by booting into flash mode and installing flashtool, however the links there and in another thread to flashtool are both dead.

I also found that it could be done by the Sony update service, but this is no longer supported and has been replaced with PC companion - which doesn't seem to do what I want.

I'm not bothered about the data. I moved everything to the external Sdcard before wiping the first time. Can anyone please advise how I can factory reset the phone that I cannot unlock? It's completely stock, unrooted etc

From reading around, am I right in thinking if I can get into fastboot, adb works from there on this phone (unlike others)? If so I will just delete the lock code from the database if it's easier.

Any advise is gratefully received.

Dan
 
Last edited:

am486

Member
Feb 18, 2011
48
12
Step 1: Download Flashtool: http://www.flashtool.net/downloads.php
Step 2: Download an appropriate Firmware in the FTF format from here: http://forum.xda-developers.com/showthread.php?t=2648320
I would suggest to use the same version, which is installed on your phone.
Step 3: Ensure the driver for the phone is installed and works correctly.
Step 5: In Flashtool, select the lightning "Flash device", then Flashmode. Select your Firmware. As I don't know, where Android stores the information about the lockscreen, you have a bit to experiment. For sure it will work, if you wipe everything and flash every SIN File. But maybe you can save the DATA, therefore uncheck the DATA box at the WIPE section and exclude PARTITION.
Step 6: Click the flash button and turn off your phone. If you connect it via USB to your PC, press immediately POWER + VOLUME DOWN. The notification LED turns green and the flash process begins.

Greetz
am486

PS: I have the phone since one year, but I still don't fully understand the recovery system. Usually there is a recovery partition, but the Xperia T hasn't one. It is somehow connected with the kernel image ... still confusing.
 
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danarama

Senior Member
Aug 22, 2010
31,278
18,811
Oxenhope, West Yorkshire, UK
Step 1: Download Flashtool: http://www.flashtool.net/downloads.php
Step 2: Download an appropriate Firmware in the FTF format from here: http://forum.xda-developers.com/showthread.php?t=2648320
I would suggest to use the same file, which is installed on your phone.
Step 3: Ensure the driver for the phone is installed and works correctly.
Step 5: In Flashtool, select the lightning "Flash device", then Flashmode. Select your Firmware. As I don't know, where Android stores the information about the Lockscreen, you have a bit to experiment. For sure it will work, if you wipe everything and flash every SIN File. But maybe you can save the DATA, therefore uncheck the DATA box at the WIPE section and exclude PARTITION.
Step 6: Click the flash button and turn off your phone. If you connect it via USB to your PC, press immediately POWER + VOLUME DOWN. The notification LED turns green and the flash process begins.

Greetz
am486

Thanks, I'll give it a go.

Lockscreen should be in /data/system/locksettings.db, locksettings.db-shm, locksettings.db-wal
 

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    Step 1: Download Flashtool: http://www.flashtool.net/downloads.php
    Step 2: Download an appropriate Firmware in the FTF format from here: http://forum.xda-developers.com/showthread.php?t=2648320
    I would suggest to use the same version, which is installed on your phone.
    Step 3: Ensure the driver for the phone is installed and works correctly.
    Step 5: In Flashtool, select the lightning "Flash device", then Flashmode. Select your Firmware. As I don't know, where Android stores the information about the lockscreen, you have a bit to experiment. For sure it will work, if you wipe everything and flash every SIN File. But maybe you can save the DATA, therefore uncheck the DATA box at the WIPE section and exclude PARTITION.
    Step 6: Click the flash button and turn off your phone. If you connect it via USB to your PC, press immediately POWER + VOLUME DOWN. The notification LED turns green and the flash process begins.

    Greetz
    am486

    PS: I have the phone since one year, but I still don't fully understand the recovery system. Usually there is a recovery partition, but the Xperia T hasn't one. It is somehow connected with the kernel image ... still confusing.