Why there are 2 IMEI numbers in the phone?

Even putting an unique SIM card in the slot 2 the device reports information about primary IMEI This, i think, is because IMEI 1 is the leading one (even

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imei slot Scroll down Choose About phone Scroll down Under IMEI , the unique IMEI number of SIM 1 is

imei slot 1 and 2 No, you need to enter only one of them into the IMEI number field More information visit Samsung FAQ page for exchange & upgrade