Okay i have a unique problem on my hands here. got a s3, love it BUT a issue has arrived recently where it doesnt connect to a network. got a proper sim works fine on iphone 4 but when i put into s3 it does not connect to network,says emergency call only and it has three out of four bars. Its annoying cause i have restored, rebooted numerous times but does not work, BUT heres where it gets weird, if i put sim into my iphone 4 and iphone connects straight away and then i take it out of iphone and put it in my galaxy then it s3 connects and work perfect, but if i off s3 and reboot again no connection again and wont connect no mater what again till i put it in iphone and then s3. HELP PLEAAASE !
Thanks in advance

Thanks in advance