Why do I have two IMEI numbers?

Why do I have two IMEI numbers? imei slot 1 or 2 I see two IMEI numbers on my phone; do I need to provide both for exchange? No, you need to enter only one of them into the IMEI number field imei slot 1 or 2 Card Slot Dual nano SIM More Standby Mode Dual SIM Dual Standby vivo Mobile India Private Limited TEC-1, TEC-2 & ONE C, WORLD TRADE CENTRE

imei slot 1 or 2 First IMEI No is for First Slot and Second No is for Second Slot Second one:A phone with dual sim cards will have 2 imei numbers This is so

imei slot 1 Dual SIM enabled phones will have two IMEI numbers  slot-2) I've contacted both carriers and each one asked for both IMEI numbers which they used to query their database to