SOURCE: SIM card registration failed, whats wrong?
The first thing to try is put the SIM into another handset - if you get the same error message on that, the SIM is blocked. If it works in another phone, the most likely explanation is that the IMEI of your phone has been blocked by the network.
SOURCE: My Nokia was working with my sim card and it just 6120c
is a problem with your sim card, it has become corrupted. get a person at your phone shop to transfer your phone number to a fresh sim card.
SOURCE: Nokia 6500 slide sim card registration problemit
Hello
There are two things causing this problem,either your phone is not registered to the Sim card's network or your Sim card is corrupt
To find out where the problem has come from,you should try another Sim with your phone, if the Sim does not work then the phone is registered to a particular network and no other Sim card will work on it.
If you try another Sim card and it works then your Sim card is corrupt and you should replace it.but to be double sure,test the Sim card on another phone to see if it works,if it does then your phone is not compatible with the Sim card's network but if it does not work then your Sim has to be changed
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