21. How is the SIM change verified?

An explanation about this topic is present in most of the IPification technology presentation documentation.

The “secret” is in MobileID. MobileID is a special value created from network triplet including MSISDN (Cellular number with country code), IMSI (SIM Card) and IMEI (Device).

When SIM card is changed it means that IMSI is different and MobileID will be different.