Error of App Close Main! During Start Up:
You can fix the app close main error..
1) Open 3rd Party Application like x-plore, Fexplorer.
2) Go to c:/system/bootdata & delete 'FirstBoot.dat'.
3) Turn off phone & take
out your MMC card.
4) Turn on phone and put in current time/date.
5) Wait for it to boot up then turn off phone again.
6) Put MMC back in and turn on phone.