Hello,
I got the Blackberry Storm 1st generation and its already factory unlocked.

If i put a AT&T sim card , i will not get any extra charges at all for any kind of data? i dont pay data for a regular phone plan for the AT&T branded phone i have , because the storms data only should work with the original carrier so i could only get text and calls and no MMS messages , Please help i just want to know will i get charged any data extra charges for having my sim in the phone with a different sim , Thanks.