Easiest Method - Thanks to billard412! From his post:
http://xdaforums.com/showpost.php?p=28169785&postcount=14 (Give him thanks)
What worked for me to to go to the screen where it requested it(thru ##3282# menu) once there type getprop ril.MSL in adb or terminal, if it shows nothing type anything in the msl box, and after it says invalid code retype getprop ril.MSL and it'll show. Hope this helps
Method #2:
I didnt develop this, but think it best belongs here. I take no credit for this. This was from Viperboy, and I expect him to get all the credit for it. Please go to his thread and thank him.
I used the zip from Viperboy in this thread:
http://xdaforums.com/showthread.php?t=1621993
1. Download the flashable zip and flash from recovery
2. Let the phone boot and go into terminal emulator (I use adb from command promp in windows)
3.Type "su". **If using adb "adb shell" then "su"
4. Type "getprop ril.MSL"
****I have had instances where the flashable mode didnt work. In that case, try the manual way listed in Viperboys OP****
Tada!!!! Right it down.
Now you can do all those hidden menu things ##DATA##, etc.