I am not an expert but if i am not mistaken, order an AT&T sim (if your carrier is locked on AT&T), from ebay. Which should not cost you much.
The only part i am not sure about is that if it can be used with 3GS.
Based on my experience, i had a handon experience with 3G, where i received phones from US and it used to be on the emergency calls only mode, and i was not able to view the OS installed. So i figured it out that by using any AT&T sim, i was able to get through the emergency calls screen and into the Phone menu (although i don't use to have any service cause the AT&T sim i was using wasn't activated/working).
Hope this helps in any way.
Goodluck. |