iPhone 4 JB FaceTime/MMS Fix

For users who have not JB'ing: (JailBreakMe has been UPDATED to fix these issues!)

UPDATE: @Comex
(If FaceTime is still missing, you might have to go to Settings>Phone and enable it)

UPDATE:

@planetbeing
You should now be able to fix FaceTime and MMS by updating Cydia and resetting your network settings. If not, restore and rejailbreak.

OLD NEWS
Quote:
@planetbeing
Running jailbreakme again will not fix FaceTime or MMS. Correction: Running jailbreakme again will not fix FaceTime or MMS --- unless you restore first. :P
For those who already JB'ing and don't want to do it again:

Quote:
@planetbeing
For existing users, chmod 755 /private/var/mobile/Library; chmod 755 /private/var/mobile/Library/Preference then Reset Network Settings
You are basically SSH'ing into those 2 locations and changing the folder permissions to 755. Reboot. And good to go.

Also JailBreakMe has been UPDATED to fix these issues!