Does tmobile carry the iPhone?
Unfortunately, No. Though, I have heard rumors of TMobile receiving the iPhone by the end of 2012
What should you do get a tmobile sidkick and keep your iphone and use it as an ipod touch or keep your iPhone and wait to get it on another carrier?
No other phone companies other than at&t will have the iPhone but you can buy the iPhone from at&t with the no commitment price, and then take that phone to an other carrier (like Verizon or tmobile) The no commitment price is a lot more expensive though, and there is many phones available that are similar to the iPhone, so be careful of what you buy.
you can't just put your sim card in it, but there are people who know how to convert the iphones over to tmobile, i have a friend that had it done..some of the applications dont work though so it just depends on what you all want from the iphone. if you just want the phone in general to make calls and text, then you can have it switched over. best adivce is to get out…