I got into the Data Programming menu but I don't know where to go from there.
Goto dialer type in ##3282#
It will ask for your MSL here
oh, lord. that info is all over this forum. But, the easy answer...call Sprint tech support and ask for it. If, and i say if, they ask why, just say i need to do a reset on my phone. I have gotten the numbers for 4 people including myself quickly and easily with no issues.