Yes, the GSM version of the iPhone is useable on the T-Mobile network, but it must first be unlocked. If you bring an At&t iPhone to a T-Mobile store, they will unlock it, and give you a proper sim card for it.
Can you use a verizon iphone with tmobile account
yes you can. But you need to talk to tmobile support to set it up.
Yes I have a iPhone On tmobile and no Internet
no, you dont. you can jailbreak your iphone and run it on tmobile's network, if you have a tmobile sim card. but on tmobile, you cant have 3g speeds, only 2g.
To unlock your iPhone with you Tmobile SIM card I would suggest you goto easyiphoneunlocker.com they have a very easy to use tool to unlock and jailbreak your iphone. I was able to unlock my iPhone 4S within in 10 minutes with no issues.
I would believe so, it can be difficult to unlock your iphone though but the iphone is exclusively at tmobile in Europe.
February 2013.
no unless it is unlocked... .
It will come out in 2013its about time
It's not it will only be available with AT&T unless you unlock it.
It needs to be Jailbroken then Unlocked. More info on my site.
well, i have a iphone and i say stick with the iphone its a great phone its the best phone out there right now the sidekick looks cool to but i really say you should just keep the iphone