Today after I did "factory data reset", the phone can not log in to the system. It keeps restarting again and again ( green robot appears on the screen first,and fell down late with a big red exclamation mark on his tummy...restart... again...). It seems phone was missing some files and it can not reboot.
The only way to start it up is to go to boot model and select "factory", format and reset everything.
Therefore, I can not turn off my cellphone. Otherwise, I have to set up again and again
What should I do?
***Edited to add labels***
Solved! Go to Solution.