Im Stumped: Unlocked Tmobile iPhone 5 on AT&T

[gotluck]

I'm failing to find anything useful from googling

Purchased an unlocked tmobile iphone 5 from swappa

Upon a full restore in itunes with my AT&T gophone Sim in, I receive "congratulations your iphone has been unlocked" popup in itunes like normal.

Then a few days later, the phone gets an "activation required" popup, I sign into wifi and activates and all is well.

Why is this happening?!

It also happened previously, multiple times, when I had restored from a backup from a verizon iphone 4s. So this happens when restoring from backup and as new, fresh :-/

Is my SIM bad? I've never really heard of that.

 

[ugcop]

Sounds more like a GoPhone problem than an Apple problem.

 

[gotluck]

Sounds more like a GoZphone problem than an Apple problem.

Gophone fully supports the iPhone out of the box, haven't had this issue previously
it uses the same APN as postpaid ATT

I thought iPhones only needed to be activated once anyway? unless you change the SIM?

 

[PsstGreek]

Maybe the backup could be causing an issue? Did you set the phone up as "new?"

 

[gotluck]

Maybe the backup could be causing an issue? Did you set the phone up as "new?"

yea, restored as new 2 nights ago, just received an activation popup just now, so it did perform 'better' than restoring from the backup.

It never fails activation either, strangest thing.