[clockcycle]

##MSL# (MSL= your phone's 6 digit programming code) will allow you to program your MDN and MSID.

Rooting and flashing a custom rom should not mess with the phone portion settings. If your phone worked previously with your old number and all you did not was have your number changed, the phone should still work, it just needs the MSD/MSID programmed correctly.

The MDN is actually your complete 10 digit number, the MSID can be the same exact number or another 10 digit number. as is the case with my phone.

You can also access the MSID using ##DATA#. You can try ##DATA+Talk button, usually when using custom roms the ## codes break or change how you "press enter" on the command..

If you understand your phone's file structure, you could look for the EPST program via CLI if you are rooted I think and run it on your phone as well. You will most probably have to know your MSL, which the tech should have just gave it to you to walk you through reprogramming your phone.

EDIT: I just tried to run my EPST via terminal emulator and received a permission denied, meaning it's in path and can be run, but I can't since my phone isn't rooted.