The BlackBerry Engineering Screen shows advanced info and settings, and is used to unlock the phone. You can open it in three steps.
1. On a QWERTY BBOS phone, press Alt+Shift+H. On a Pearl, hold Alt and type RACE. On a touchscreen BBOS phone, hold Escape or Menu, and tap the top left, top right, top left and top right corners. On BB10, open Browser, enter escreen:// and tap OK.
2. Complete this form in BB Browser or any browser with JavaScript. Details aren't stored.
Use lowercase letters
Don't type 'secs'
Your key is:
3. Enter your key - you won't see what you type. On a QWERTY BBOS phone, press Alt before digits. On a Pearl, use multitap. On BB10, swipe from the bottom with two fingers.
4. You can reopen the EScreen within the key duration by following step 1.