Who says your have to???
touch pro 2 and diamond 2 aren't compatible with SERO plans and I think they require the simply everything plan. Same for the hero and the andriod phones coming out. There is a "newer" SERO plan (forgot the name) that will work with those phones
I'm on a SERO account too and don't plan on changing anytime soon!
Were you the guy I explained SERO to about a year ago???
doubt it. I first posted about SERO around this time in 2007