1. Open Cydia.
2. If it asks you to upgrade, upgrade all packages!
3. If it doesn't ask you to upgrade, go to changes tab, hit upgrade in upper right, and upgrade all packages!
4. After this, go into settings on your iPhone, and turn MMS and FaceTime ON.
5. Reboot, and it should work!
There you have it, you have fixed these issues! If you liked the video, subscribe to our YouTube channel at http://www.youtube.com/danglekingpc. Thanks!