How do I find my serial number? MEID, ESN, IMEI, or ICCID

mei4dIMEI: International Mobile Equipment Identity (IMEI) is a 15-dit code globally unique to each tablet or phone. MEID: Mobile Equipment Identifier (MEID) is the only unique numberOn 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