Swing & a miss! You completely missed the point and failed to answer the question. But I'll help you out a bit:

Verizon's churn is HALF that of Sprint's (VZ postpaid churn currently at 0.89%, Sprint's postpaid churn currently at 1.75%). You can keep on your blinders and go around thinking that Sprint is "tops", but the churn numbers refute your opinion. Sprint has improved, but Sprint is definitely not "tops" - Verizon still kicks Sprint's butt around the block, daily.

You can consider Nextel to have dated technology, which in relation to data is true. However, Nextel's voice calls are every bit as good as VZ's or Sprint's (we use both VZ & Nextel, with close friends who have Sprint, so the comparison is accurate in this part of the US), and in relation to PTT, there is still no comparison, Nextel is king and VZ's & ATT's PTT emulation is considered by many to be inferior, hence VZ and ATT have picked up very little PTT busines despite their years of trying. So about all you can say is "dated technology" relative to Nextel is that iDEN is no good for data, but it does still excel at voice calls and is absolutely king when it comes to PTT calls.

The point was, and the question is, why is it that Sprint STILL can't hang onto its existing customers?

If you can't answer that question, just forget it, because that's all that matters in terms of Sprint's long-term survival.