iphone A1203 8gb restored now is saying insert correct sim to activate iphone
 

i restored my i phone using itunes and i dont have the original AT&T sim no my iphone tells me(((( the sim card seems not to be supported please insert another carrier or requet that this iphone be unlocked.)))))) but it can make and recieve calls with my local networks... i already did imei check with cyclone box

it can receive, not make.Be clear here.

what is yr imei so we can help

you have a iphone2g you can activate and also unlock with resn0w
if you flashed 3.1.3(most latest version) then follow this guide How to Unlock/Jailbreak Your iPhone 2G on OS 3.1.3 Using RedSn0w (Windows)
Thanks

Follow the guide its very easy to unlock iphone 2g