T-Mobile iPhone on At&t?

[lukechanning]

So I got an unlocked iPhone and signed it up for a T-Mobile FlexPay account. I took it home this afternoon, and I noticed that in addition to the T-Mobile network, my iPhone was also picking up the AT&T network. If I leave the phone on automatic detection, it seems to alternate between the two (obviously picking the strongest one). I can receive calls and send texts on either, it would seem.
So what in the world is going on here?! :S Am I roaming? Does T-Mobile have some kind of partnership with At&t in my area (Central Arkansas)? I'd like to know, because sometimes At&t's network is a lot stronger and using it would be awesome, but I don't want to rack my bill up. Any thoughts?

[Snagga]

how do u know when ur on att? does it say it in the upper left corner?

[sursture]

Why not call T-Mobile and ask.
They do not mind what phone you are using - they want you as a customer.

[GIRLLLLLLLLLLLLLLLLL]

Roaming is free on the T-Mobile network

[n00neimp0rtant]

Yeah that happens if you are in between T-Mobile service and AT&T service that can roam on T-Mobile.

[lukechanning]

It says in the corner, and I can find it if I do a search for available cellular networks. Having used it for a couple hours, I can say that no matter which network it grabs, my account acts the same. This is weird, but not entirely unpleasant. . . :P

[lukechanning]

Sweet! So this won't be something that will just disappear? I believe I'm on the border between both services, so roaming would make sense. That's fantastic, though!

[Broomhead]

Please only start 1 thread per topic... Thanks

[lukechanning]

Sorry! I meant to delete the other, but completely forgot! Many apologies!

[Broomhead]

Thats cool.... but you can't delete thread only mods can next time just report the thread and we'll take care of it

[lukechanning]

Oh! :P Well thank you, then!

[Broomhead]

both of your threads had posts, so I merged them together cheers and welcome to MMi