In today’s hack, we take a look at a slightly newer tablet than last time, and find out just how much more difficult it is to crack open an Android 7.1 “Nougat” device than it was just 2 major-OS-versions ago.
Spoiler-alert: I did NOT actually end up successfully removing the FRP lock. Instead, I insisted that the owner try harder to find the appropriate Google account info for the device. Which they did, thank God. I am currently waiting on them to set aside some time to walk through the remaining recovery steps.N.
- XDA Forums post which contains the actual stock firmware needed for my specific device (T377A).
- Google Drive link to the firmware (and my own copy in OneDrive, in case he ever decides to take his down)
- Other searches & posts in XDA that led me to the answer.
Now, you may be wondering, how is this useful? Well, dear reader, allow me to explain.
- Scenario A: You need to factory-reset your tablet, but it’s been borked/bricked by some strange 3rd-party firmware or a bad update.
- Scenario B: Like me, you’ve managed to use Odin to flash it to “factory binary” firmware (kinda like diagnostic/debug mode), but you forgot to store a backup of the actual firmware first (the one that a normal human can use).
As a reminder, the standard startup-button-combos are as follows:
- Recovery mode (standard): hold Home, Volume Up, and Power.
- Odin mode (aka firmware download/re-flash): hold Home, Volume Down, and Power.
We’ll talk about #2 first. This has a nice warning screen about how tech-y it is, so you can “abort mission” by pressing Volume Down if you made a mistake coming here. Otherwise, you hit Volume Up, and continue into “Odin mode”. From there, you use the Odin program on your PC to flash the firmware. Obviously, you need to have the tablet connected to the PC with a standard USB cable.
Recovery mode, #1, also looks kinda techy, with the black background and orange & blue text in a sort of old-school Matrix-y way, but it’s really not complicated. You have options like ‘Wipe data/factory reset’, ‘Wipe cache partition’, and ‘Reboot system now’. You navigate up and down with the Volume Up & Down buttons, and make a selection with the Power button.
What do you mean, Theoretically?
Again, I was not successful in actually removing the FRP lock (which was the goal and outcome of the previous post on this topic, albeit with the older tablet). But in theory, if you needed to go that route, this is a decent place to start from. Because if you make a mistake or “brick” the tablet, restoring the stock firmware should get you back to square 1, where you can try ‘hacking’ at it again.
Always always always. ALWAYS. ALWAYS. Correctly sign out of and wipe your devices when you’re done with them (giving them away, throwing them out, selling them, etc). It never gets any easier trying to recover that stuff or work-around it to “break into” a device that you’ve turned into an expensive paperweight by forgetting your owner-login info.
This means, while your tablet is still on and accessible to you (i.e. you can unlock it, use it, get into Settings, etc.) — use the Settings menu to do the wipe/reset!! It varies slightly between devices, but it’s generally under Security somewhere. Just Google “<your device name> factory reset”.
Get your account recovery options up-to-date and keep them that way. Same for your loved ones and relatives. Spouse, parents, etc. By setting up and maintaining proper account recovery options (alternate emails, phone numbers, 2-factor authentication), you can be reasonably secure and still able to work on someone else’s behalf in terms of device ownership and recovery.
That’s all for now folks! Stay safe out there.