reply to Network Guy
Re: Slow.... T-Mobile are actually not getting rid of GSM, they're just reducing the amount of space allocated to it. The new Ericsson Air equipment they are using on the towers allow 1900 GSM+HSPA and 1700/2100 HSPA+LTE all from the same panel. This also allows the towers to do some serious load balancing between between the frequencies as well. Pretty amazing when you think about it and a much more integrated approach than AT&T or Verizon are taking.
So don't worry, all that AWS HSPA+ and PCS GSM coverage isn't going away anytime soon. The worst that is happening is in some markets they are reducing it from HSPA+42 (Dual Channel) to HSPA+21 (Single Channel) in order to fit LTE in the amount of spectrum available in those specific markets.