No, it's not a jailbroken. Actually the problem is that it was updated to ios 7, I think, from the original ios that came on the phone. This was done awhile ago and over time it has just generally slowed down and is low on space, even after deleting texts and pictures. I was hoping that if it was restored to factory settings, it would erase the update and go back to the original. But it might help to restore it anyway. Thank you!