My friend set the Lock screen PIN but now it is not recognised anymore.. maybe he set it wrong, or he forgot the correct numbers. Anyway, now the phone is stuck at the pin request and we can't do anything.
Situation: Galaxy Nexus on 4.2.2 stock with stock recovery - Unlocked bootloader, root permission, wifi on and connected.
these are the procedures I tried:
- first of all, inserting wrong pin 5 times should give a message to access with google accounts, but we have no message... perhaps this is only for locking screen with sequence.
- adb commands: requires usb debug on, and luckily we have it on. However, 4.2.2 introduces whitelist for usb debug connections (read of it on androidpolice): when connecting to a pc in usb debug mode, phone asks you confirmation. Since we can't get past the lock screen, we can't confirm that and adb finds the device 'offline'.
- install "screen lock bypass" from web play store: phone is connected to wifi, installing an app from web play store will send it to the phone and install it. Then, connecting phone to a charger would pop up a request to unlock it. Unfortunately that app is only compatible with android version from 2.2 to 4.0. Even if I download that .apk to trying manual installation, I can't push it with "adb install package.apk" since adb won't work (see previous procedure)
- flashing from recovery a modified update.zip that will overwrite lockscreen settings: simply put that modified update.zip into sdcard and flash it from recovery. But our nexus has not a removable sdcard, and connecting to pc won't show files because it is pin protected (very smart, android!). Moreover, it requires cwm or twrp recovery and I don't have that installed.
A real mess, right?
Is there anything else I could try? I really want to save his data..