I have an old iPhone and an att data plan, so can i put my simcard into the phone?

[[email protected]]

I have a phone that has data but my dad gave me his old iPhone 3g to use as my phone but we don't know if i can just stick my simcard in and use it. Can I?

 

[Unregistered]

If the iPhone is not locked with any other network, you can use the sim with iPhone. Otherwise you need to unlock it. I suggest you can approach Simpleunlocking.com and specify the country,locked network of iPhone. Based on the availability you can get the permanent unlock service along with free instructions.