Unfortunately, the voice/data plans have been made for the hspa+ network and the old prices for the data/voice plans will ONLY work with the CDMA network! I asked the same thing. I have the unlimited data plan they offered 2 years ago at x-mas. Sadly, unlimited data does NOT exist with HSPA+. Just have to deal with the new data plans they offer for the new network or stick with the old plan until you have no other option to switch! Voice plans can be switched over, but data cannot!
