A few weeks ago I started a new project that involved ordering a bunch of handsets and getting them unlocked for mobile application development. The initial overwhelming number of devices that I had to order was a great chance for me to test out a bunch of devices to see what they could do and how they look and feel in person. But the real value that I wanted to share is the unlocking procedures. While there are bunch of sites and services that will sell the unlock codes, I’m just here to provide the instructions. So far the steps work out for all the devices that I have had to unlock.
For RIM Blackberry devices on AT&T/Cingular, here are the steps. This works for all devices except for the Curve.
First, turn off the Radio 
Next go to Settings > Options > Advanced Options > SIM Card
You might see a blank screen. Not to worry, just do the following.
Hold down the ALT key and press the keys that correspond to: m e p d
Next hold down the ALT key again and press the keys that correspond to: m e p 2
You should see a menu where you can put in a 16 digit code and 10 tries to punch it in correctly.
After you enter in the code, press Enter.
It should say “Device Unlocked” and you’re done!
Tags: blackberry · Blackberry Pearl · Mobile · mobile phone · RIM · unlock7 Comments
7 responses so far ↓
what is the MEP code ?
MEP corresponds to the letters “m” “e” and “p” using the keypad while holding down the ALT key.
how can i unlock a curve (the actual device) if I have forgotten the security code and cant get into the device?
Juan: Are you talking about a hard reset? If so, pull out the battery while the device is on, wait about 5 minutes, then put the battery back in and start up the device.
If you are completely locked out of the device, depending on your technical skills, you can look for the program: jl_cmdr and an OS file to reload the entire OS from scratch.
[...] month, I had a post about unlocking RIM Blackberry devices. One reader commented how can i unlock a curve (the actual device) if I have forgotten the security [...]
after holding down alt and entering in the sequence you state to, nothing happens. i am using an old at&t wireless sim in a new at&t device. it just says “no valid sim card”. any idea what i am doing wrong?
Try this sequence.
m = button 9, tap once
e = button 1, tap once
p = button “O P”, tap twice
d = button 4, tap once
m = button 9, tap once
e = button 1, tap once
p = button “O P”, tap twice
2 = button 2, tap three times