Since the release of the iPhone, AT&T has had an exclusive contract with them.
(Yes.)
Yes. The iPhone 4 came out. For AT&T it came out on June 2010. For Verizon it came out on February 2011
An iPhone 3G cost about $299.00 or $199.00
You don't "have" AT&T, the iPhone comes with the ability to connect to AT&T.
No, T-mobile does not have the iPhone. AT&T has it though.
T-Mobile does not have the Iphone only At&t does
There will not be an iPhone 4S for T-Mobile but you can get any iphone unlocked at unlockatt.com
The iPhone 5c is newer. The 5c came out on September 20, 2013 and the 5 came out on September 21, 2012.
No it is not. It is for AT&T unless you "jailbreak" and "unlock" an iphone. Instructions to do this can be found on the internet.
iPhone came first, then the iTouch.
The iPhone 2nd generation
Yes. AT&T has always carried the iPhone since 2007.
AT&T doesn't sell the iPhone 3GS in white.