I have the same problem. It was fine earlier when I installed the iphonedelivery repo. Then I noticed the faded bubbles in text and was told if I deleted the repo text would be fine again. After I deleted the repo thats when I noticed I lost FaceTime. I already tried cydia update and even reinstalling the repo with no avail. Hopefully someone can figure this out cause I would really hate to restore my phone if it is an easy fix or something.