mei4dOn the following devices, find the serial number in Settings and the IMEIMEID (the MEID is the first 14 dits of the IMEI) on the back: iPhone 6. iPhone 6 Plus. iPhone SE (1st generation)IMEI, MEID, and ESN numbers can be used to track mobile devices for the purposes of repair and replacement as well. If a device is being repaired or replaced, the manufacturer or repair center may use the device’s