iphone 4s problems w/ messages
HI - I've been using my iphone 4s for over a year, and it stopped sending IMs through "messages". Tried to delete old IM strings, but they keep popping back up. I've signed out of the account and signed back in; powering down; nothing seems to work.
Is there a way to delete the app and reinstall. Doesn't appear to be obvious.
HELP!!!
iPad, iOS 5.1