Boot Loop Occurs in Android One Devices after Upgrading to Android 6, to Fix this Follow these Steps.

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Important : Once you have chosen to use SD card as internal storage, don’t transfer apps back, from SD card to device’s own real Internal storage, as this may cause problem. This will result in your device bootlooping.

And if you have done this by error, then you need format the data partition. That will fix it.

For this, disconnect the device from PC if connected, and boot it into recovery mode. Do this:

  1. Power off your device first. Then wait for 4-5 seconds after screen goes off.
  2. Press and hold Power + Volume down button until you enter bootloader mode (you will see FASTBOOT written at top).
  3. Use volume up/down 2-3 times to bring up recovery menu, and then press power button to select it. You will see TWRP recovery shortly.

You can use default stock 3e recovery or TWRP recovery, both will do.

In 3e recovery, use volume buttons to browse between options, and power button to select it. So, select the wipe data/factory reset option. Then confirm the action on next screen by choosing yes, and once the process is done, select ‘reboot system now’ to restart the device. This should fix this.

In TWRP, tap on Wipe, and then do the swipe action at bottom to confirm it.

Then tap on Reboot system to restart the device.