How do I check the IMEI number?

What is an IMEI number? How to find yours? imei slot 1 imei slot 2 I can't turn either slot back on I would like to test the SIM card in another device, but I don't have another compatible device INVALID IMEI imei slot 2 An IMEI code is available on all mobile devices that support the operation of SIM cards, and is assigned to each SIM card slot separately If a mobile device

imei slot 1 slot 2 1-Link to FBR Upon In case of dual SIM slot, how can I register my 2nd slot IMEI, if only my first slot IMEI is registered?