What does IMEI-SV mean?

How to check IMEI SV in vivoT1 44w phone imei sv slot 1 problem imei sv slot 1 - Bogor - Xiaomi Community imei slot 2 1 has IMEI SV unknown, 2 has 01 I suspect the lack of IMEI SV number is the reason why SIM 1 cannot makereceive calls Both SIM slots have

imei slot 1 slot 2 nedir slot1 or in both slots or no SIM card at all then IMEI for slot 1 will be used We will need to get rid of IMEI however due to Google policy