HouseApe, in my case, I tried to use UniCDMA and it didn't want to recognize my phone (a US Cellular 8330m). My guess is that UniCDMA has a problem with the long HEX MEID numbers. I tried it multiple times and with two different computers, one running Vista Home Premium and the other running XP Home.

In my case, I finally got my SPC through a US Cellular employee.