Hi never used these forums before but thought people here might be helpful.. I've tried rebooting it, it's not jailbroken or anything like that, I'm on 6.1.3, but it literally sends me 100 messages from an unknown # saying message not found every time it is turned on. It messes with my battery and current texts and is super annoying. The # of texts also increases, it started around 30, 50, 70, 80, 93, now 97...Any ideas? Also I'm using a 4s!