MEP refers to an identification number placed on all Blackberry smartphones. It stands for mobile equipment personalisation. When a wireless service provider (ie. Vodafone, AT&T, T-Mobile, etc) places an order with RIM for new Blackberry handsets, these handsets are programmed with firmware to match the carriers specifications (language, logos, etc). This process also embeds a carrier specific MEP number into the engineering screen of each Blackberry handset. In many cases in order to successfully get an unlock code for your phone, you will need to find and provide an unlocker with the MEP number off your Blackberry.
How to find the MEP Number on a Blackberry Smartphone
If you are planning to unlock your Blackberry cellphone so that you can use it with active SIM cards from different service providers, then it is important that you know the MEP number from your handset. Blackberry factory settings only provide 10 attempts to enter a correct unlock code into your phone. If you end up with 0 attempts, then your phone will be hard-locked and you will not be able to unlock it.
Providing the IMEI number from your Blackberry is not enough to guarantee a 100% correct unlock code. The only way to guarantee a 100% correct unlock code is to provide UnlockWorldwide.com a correct IMEI number and a correct MEP number.