Missing IMEI number of Second SIM slot

Missing IMEI number of Second SIM slot imei slot 1 slot 2 I have a Oneplus 3T in Midnight Black that has the same IMEI number for 2 sim slots Surely this is a problem imei slot 1 or 2 but now i find out there is no way to use second slot , can you explain it to me ? my phone support only 1 sim ?! so why it says dual sim and

imei slot 1 or 2 IMEI, on dialing *#06#, does not match with the IMEI information provided by 1 to proceed * You can also find it printed on your phone below the

imei slot 1 Product Related · 1 Airdopes: On the product: The serial number for Airdopes is generally located inside the charging case's lid as shown below: · 2  No, you need to enter only one of them into the IMEI number field More information visit Samsung FAQ page for exchange & upgrade