How to convert an iPhone with AT&T to tmobile? I need to know the steps?

How can I convert an iPhone with AT&T to tmobile? I need to know the steps?

Check the AT&T web site to see if you meet the eligibility requirements for unlocking the phone
http://www.att.com/...McwVofkQXV

If you do, contact AT&T and they will unlock your phone (for free).

Then take your phone to a T-mobile store and they will give you a T-mobile sim to use in your phone and set you up with a contract.
http://reviews.cnet.com/...t-iphones/

Make a american apple iTunes account

The first step would be to get the iPhone unlocked if it is not already because you can't use the sim from another carrier in your iphone before you do that

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