I just bought a used VS980. I don't use a Verizon's CDMA UIM card. GSM SIM card inserted it can work, but the non-Verizon CDMA card inserted it shows "no service". Is it locked by Verizon? Dialing enter the code "2945#*980#", the phone displays "Connection problem or invalid MMI code", so even if I get an unlock code, how should I input the code?