Hey guys! I have this issue with my phone. I can't use another SIM card on my phone except two particular SIM cards. I had been using these two SIM cards for a long time. And I thing u dial something like *stg# and then it shows u what types of SIM cards it can accept - I think it's like that idk- . I think there is stg u do to make ur phone accept any SIM card. So please is there anyone who knows about this stuff?? Thanks!