Hmm, are you sure? Because with my straight talk service, the data apn had to be changed to work when first activated (didn't need jb to do this). But I have since backed up and restored a build with the altered data apn, and the data has worked after restore, meaning it didn't reset to what it was when I first got the phone...wonder if the same would be true of the mms apn...
I guess my other question is if I make a backup of my current jailbroken phone, and then factory reset/restore to it, will it be jailbroken or stock? Sorry, I rooted a few Android phones, but this is my first iphone, so still learning.
----------
So if I backup my current jb phone, restore to stock, then restore the backup (of jb iphone) - it will be a stock build with my data but none of the jb stuff? (see question above). Thanks!