Samsung SPH-i550

The best system, the worst phones. Any carrier that jumps on this phone as a sure winner. Why do these companies take so very long to relase a phone when it has been announced. The Kyocera 7135 was almost a year old before it was sold. Now many of us are waiting for the next generation to upgrade. An easy sale for a company like Verizon.Why do they stall so long?????