If we are experimenting with custom ROMs on our phone we can stuck on bootloop. Till it isn't firmware fault we can easily fix this problem.

- We turn on our phone in recovery mode
- Than we plug in our phone to PC with USB cable
- Next in our PC we see the recovery partition, where we copy update.zip file with our Flyme OS version
- In our phone we select Update and click "start" (optionally we can select "Wipe data" which will eraseall user data on our device).
- Update will be installed and phone will restart and should work normally.


NOTICE:
If you want to experiment with your phone, always remember to have update.zip file on your phone, so you can easily recovery it.