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What is an MEID number?
MEID stands for Mobile Equipment Identifier and was introduced to replace the ESN number for CDMA phones. Each and every cell phone carries this unique MEID identifier which enables carriers to identify the past records of each phone, and account associated with it.
Why Am I Asked For This?
Cell phone carriers will use this number to check the history of the phone and your account. They will find out whether the phone has been reported lost or stolen, or whether you have any bills that are unpaid.
How Do I Know If My Phone Is Clean?
The only way to truly know if a phone carries a clean MEID number is to phone up your current cell phone carrier, who will be able to perform some checks for you. If you have purchased a second hand phone we also recommened checking the MEID number.
How Do I Find My Phones MEID Number?
There are two easy ways to find the MEID number. The easiest we will show you first: If your phone is powered on try checking in the options menu and selecting status (we know this works for Blackberry users). The other way is to open the battery cover on your phone and remove the battery. There should be a white label under where the battery sits, the MEID number will be displayed here next to the serial number.

What Is Bad MEID?
Bad MEID, the same as bad ESN, comes about when either your cell phone has been lost, stolen, or has outstanding balances on the accout. This will prevent you from being able to activate the phone, so you will need to contact the carrier to readdress this problem.