iPhone 3G, AT&T, T-mobile?

[paypaboi3100]

This guy I use to go to school with just IM me saying he had
two 16GB 3G iPhones in black brand new in the box for $200.00
I'm going to check them out tomorrow I know its not BS because
I bought my 1st Generation iPhone from him which i have now
that works perfect unlocked on t-mobile with 2.0 and everything.
However, my friend wanted both when I told him and then I looked
on ebay and saw how much they were going for! I have money so
I can't be greedy like that so I am going to give him the 1 for $200
and was wondering a few things:

1.) He has AT&T so can he just put his sim in and use it to just call
and text with no problems? He has a sidekick LX so AIM and Internet
is not a big concern for him he just wants to upgrade his phone with
out getting that expensive bill.

2.) Can 3g iPhones work on t-mobile since they are 3g? MY guess was
yess just won't work as 3g right? Correct me if I am wrong.

Special thanks to whoever can answer me these questions and give me
even more info because i am not sure about these 3G iPhones. If your
extra nice and want the other I will consider private listing on ebay for
$600?? (Just a thought not trying to sell on her). No I am not a scammer
MySpace.com - B.B.E.P.M. - 19 - Male - Chino Hills, California - www.myspace.com/paypaboi3100 is my myspace MySpace.com - PAYPABOi - 909 MoVe - 909, California - Rap / Hip Hop / Rap - www.myspace.com/paypaboi3100m is my music myspace and if you
want my facebook and phone numbers and e-mail addresses if you feel
sketched out you can have those too lol (i have been scammed before so i know how others may feel)

[[email protected]]

^^ No at this time tmobile will not work as there is no unlock for the 3G

[kraziebone]

Well you can't software unlock it but they have done the sim adapter unlock for the iphone 3g so if you can get ahold of a sim adapter you can use it with T-mobile in the United States. My question is will t-mobiles 3g be compatible with the iphone 3g? I know they havent encouporated it yet but when they do will it?

[mobilexile]

The T-Mo 3G network is several months behind AT&T. You'll be able to get by with EDGE and, if you're in a large metro area you *might* get 3G. As noted, a SIM card unlock is possible at this time, not software.

The week the 3G units hit the stores T-Mo said they had 3G in their top 25 markets. When pressed they (customer service) were unable to name, confirm or deny 3G service anywhere in the US.

[DoerrFan]

3G iPhone won't work on T-Mobile ever, the frequencies differ, but EDGE should work fine.