I've also yet to see any roaming on my phone, and I've had my cell service get 0 signal sometimes in heavily concreted buildings and AT&T's signal should penetrate those fine but nope, nothing. Every time. Always get no signal and no roaming.
Are our phones able to even pick up the AT&T frequencies?
Current phone: Samsung Galaxy S4
(T-Mobile, my hero.)
Retired phones: HTC Droid Incredible
(Verizon), Motorola Droid RAZR MAXX
(Verizon), Samsung Galaxy S3
(Verizon), Samsung Galaxy S4