Hi,
My issue started here:
and in the end, the only solution I could find was reflashing with Emma and starting from scratch.
The first time I struggled with the procedure, and the last time I reordered my notes, I hope they can help:
- After Emma :
- Open Settings, and select “About”.
- Tap on “Build number” seven times.
- Go back, and select “Developer options”.
- Scroll down, and check the “Android debugging” or “USB debugging” entry under “Debugging”.
- Plug your device into your computer.
- On the computer, open up a terminal/command prompt and type
adb devices.
7.On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type “adb reboot bootloader”
-
Turn off your device.
-
Connect a USB-cable to your computer.
-
On your device, press the Fastboot key ( Volume up ) at the same time as you connect the other end of the USB-cable.
-
When your device is connected, open a command window on your computer and go to the platform-tools folder within the Android SDK folder.
-
Enter the following command:
fastboot devices -
Verify that you get an answer back without any errors.
14.Temporarily boot a recovery on your device by typing the following command (this will boot into recovery mode directly (TWRP))
fastboot boot twrp-3.3.1-1-pioneer.img
-
In TZRP, go to main menu, then tap Wipe.
-
Now tap Format Data and continue with the formatting process. This will remove encryption as well as delete all files stored on the internal storage.
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Return to the previous menu and tap Advanced Wipe. Select the System partition to be wiped and then Swipe to Wipe.
-
From the main menu : Install → from OTG USB
But sorry, first step is Emma…