HI if your wife's Nokia 2630 mobile is asking for restriction code when you insert your sim in it .Then it mean the phone is locked to network provider other than one which you are going to use to fix this you have to unlock your phone first .You can easily unlock the phone using sites like SuperUnlockCodes.com here they are providing unlock code for all mobile models at reliable cost ...After unlocking the phone you can freely use it with any GSM sim ....