I bought the galaxy S3 yesterday on 3. Since then i've been trying to use the phone as a phone, but I can't make any calls, texts, emails or do any browsing of any sort. Although I have about 50% signal, i'm only allowed to make 999 calls. I've tried connecting to the 3 (3G) network manually, but my sim doesn't allow it. I've reset the phone / took out battery / took out sim many many times but to no avail. Any suggestions will be very much appreciated.