here's how to find it on the Warp with Gingerbread 2.3.5
Download "alogcat" from google play
When you open aLogCat, click Menu, then Filter.
Set a filter on the word "code" without the quotes
Wait a few seconds or more. Or go to phone and trying ##3282# again, select Edit, then Cancel. Go back to aLogCat, look at the results. You'll probably see two 6 digit codes listed. One of them is your MSL.
Go back to your dialer, enter ##3282#, select Edit. Try each code. One of them will work.
Be aware that if you enter the wrong MSL twice the phone will automatically reboot.
If you are root download MSL reader from google play