MEID stands for Mobile Equipment Identifier. It is a unique number exclusive to your device. The MEID number is your phone's official ESN (Electronic Serial Number).
With most devices, the ESN/MEID is at the back of the handset, underneath the battery. The ESN/MEID is normally an 18-digit number labelled DEC and starting with 256, 268, or 270 (though not always). On some older phones and data devices, the ESN/MEID is an 11-digit number, often beginning with 0.
The most important thing to know about an MEID/IMEI number is that it is a unique ESN that no other phone has and that the MEID/IMEI number is required to activate your phone.
A phone's ESN/MEID number can be located in several ways:
1. It is typically located on a sticker behind your phone's battery (provided your phone has a removable battery).
2. It is typically printed on the box your phone arrives in.
3. It can also be easily located within your phone's settings console under about/general.