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Out of contract with ATT, ordered the contract free tmobile version. I'm switching over to Cricket/HarborMobile. Not sure which one yet.

Screw Next, I'll save more money buying the phone outright and switching over to a contract free/prepaid plan. I upgrade my phone every 2 years.
 
I did a few days ago and then unlocked my 4s and then went in to tmobile and switched my service and phone number to them. So far, so good.
 
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