Recently i got a new bsnl postpaid sim n put on my Nokia 6630.It works fine n m using it for arnd 2 months.I took out da sim n inserted my Airtel sim to ceck da validity bt to my surprised sim nt detected.I tried wid my friends sim card bt stil nt detected only my bsnl
sim was detected.Why cud dis b?
sim was detected.Why cud dis b?