I have just recently bought a Samsung galaxy s4 and I ordered a new micro sim from 48 to put in it to replace my old sim. However, the phone acknowledges that the sim card is in but won't connect to 48. It says "selected network 48 is unavailable" but yet I had to put in the right pin at the start. I tried a vodaphone micro sim and there was no problem connecting. Any help on this matter would be greatly appreciated. Thanks