2014-04-03, 22:43
Already mentioned booting into recovery and doing a factory reset if you can
If you can't do that, or it doesn't work, and you don't have a backup, then you'll need to find a ROM for your phone and flash it with flash tool.
If you can't do that, or it doesn't work, and you don't have a backup, then you'll need to find a ROM for your phone and flash it with flash tool.