[Yves]

Quote:

Originally Posted by ServerScripter Well , I heard there's a way to add apps by formatting the Iphone or Flashing it..

Flashing it its a jailbreak as i did it with mine before i had free apps an stuff like that and unlocked.
for as i know you cant jailbreak if its on 6.1.3 OS only lower

ONTOPIC best way to get your apps working is just reinstall them or restart the phone itself.