repair imei bb 9900

My IMEI: 004400. cara update os blackberry 9900 15 202000 0 Good afternoon! I have IMEI has turned to zero, does not see a SIM-card, but it is possible to change a PIN-code Because of IMEI phone cannot do calls After adjusted in adjustments of phone {parameters- management of calls-} proceeding calls in roaming, has entered wrongly the password, has some times entered