Here's a stupid tip for people like me (I wish I had read it) If you guys use GetSPC, that program runs from you PHONE not from your COMPUTER . I was getting mad at it for not working
And make sure you enter your ESN with all CAPS for the letters otherwise it will spit out a different value.
But you definitely want to do this BEFORE you flash your phone, so that you can have all these values if it nukes your settings.