my mx4 pro suddenly begin to “optimizing apps” and then it wont boot anymore, so i searched and found out it was “bricked” and then i connect to laptop and saw the recovery and i download firmware and paste it on recovery then on the fone there are two options “system upgrade” and “clear data” restart and retry. every firmware i download i choose system upgrade and retry and then it just load up to my wallpaper and restart again. please help me on what to choose the best firmware to download. it happen to me I think 5 days ago.
1- Boot in recovery
2 - Paste the firmware (update.zip) be careful about the syntax
3 - select "clear data"
4 - select "system upgrade"
5 - wait for reboot
Normally, you should be fine (can’t remember if any progress bar, but one of the very first steps is program optimization ). If not, try with “A” firmware as you phone may be a tweacked “chinese” one.