Unlock Problem of i9505 with Z3x


Its the 3rd phone samsung i9505 which now has the same problem of not reading the SIM card after unlocking with z3x …

this is not the first phone i have unlocked with z3x however i dont understand where the problem is … the unlocking process goes normally very well however after the unlock the phone does not detect any other SIM card execpt for the original SIM card operator it is blocked to … the phone is also NOT BLACKLISTED since the customer has the proof of purchase with him …

can anyone tell me what is going on with i9505 and z3x ????

pls help urgently