Will it cost extra to insert my SIM card into an iPhone even though I already...

[HarshaGoli]

as long as you pay for 3G internet already you can. but you will pay the $40 for maintence that is an extra fee

 

[ThereseWalker]

...have a data plan? I have a Samsung Impression and I have the plan that allows me to use the internet and send picture texts already.

 

[returned]

...have a data plan? I have a Samsung Impression and I have the plan that allows me to use the internet and send picture texts already.

No, as long as the iPhone is not locked with a different network. If it is, then you need to unlock it. To unlock, I suggest you can approach Mobileunlocksolutions.com and specify the country,locked network of iPhone.Based on the availability you can get the permanent unlock service along with free instructions.