Why does my phone show 2 IMEI numbers

In case of dual SIM slot, how can I register my 2nd slot IMEI, if only my first slot IMEI is registered? It means your credentials have been

It is a 15-digit number that can be found on the back of almost every device that has a SIM card slot and a SIM card slot means that all SIM

imei slot 2 After activating the SIM slot of a mobile device, it is necessary to enter the IMEI code of the mobile device into the national database within 30 calendar days

imei slot 1 IMEI IP IP slot Memory effect Messaging MHz Micro USB microSD microSDHC