will my three sim card work on the iphone?

When you get the iphone 3g, you have to sign up for a contract with ATT. You can get out by paying the termination fee on the contract, but its $150. The iPhone's locked to att too.

Hanna G said:

i am currently on a three contract but want to get the iphone.
i just want to know if my sim card will still work in the iphone

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Your Sim Card may work in Iphone if it is an unlocked one.If it is a locked you can still unlock it with the help of Unlock-Zone.com where you need to mention your network and country your phone is locked to.They unlock your phone with the help of remote unlocking service and also provide free unlocking instructions.