First, I have to note that I'm a huge fan of T-Mobile, purely because of how quickly you guys roll out WCDMA updates. You guys were first to deploy 64QAM (HSDPA 21.1), and first to deploy DC-HSDPA in the USA, while meanwhile AT&T continues running 16QAM in most markets with no public plans to move forward. At some level I view T-Mobile as the only real GSM/UMTS carrier in the USA thanks to that commitment.
A couple of things I've always wanted to ask:
Can you talk briefly about how much traffic on GERAN you see from iPhone customers? How much of a catch-22 is that situation for moving that PCS spectrum dedicated to it over to WCDMA?
In some markets it seems as though T-Mobile will be unable to run DC-HSDPA on AWS alongside any LTE because of lack of spectrum. Obviously multi-band carrier aggregation (WCDMA carriers on PCS and AWS) is a big part of that future, can you talk about the challenges involved there?
Will T-Mobile deploy 3GPP Rel 8, or will you guys go right to Rel 10 for LTE?
How much variance in WCDMA utilization do you see across markets? From your point of view, are caps and the end of unlimited data plans really backed up across the board, or just in a few markets? In my AZ markets (Tucson, Phoenix) where I do a lot of testing, I am regularly find I have the sector to myself.
Traditional PA at bottom architecture, or Remote Radio Head architecture for T-Mobile LTE?
This is already somewhat obvious, but could you confirm/discuss T-Mobile LTE channel bandwidths?
We have about a million iphones on our network now. 99.9% of their traffic is 2G/EDGE only right now, so obviously their load is dwarfed by everything else. The iphone is a significant part of the modernization project. Once implemented, iphones will work on U1900 at much higher speeds.
Spectrum is always a limitation. With the software that exists now, you will not be able to do dual carrier split between AWS and PCS. That's supposed to be fixed in the future, but I don't know a timeline on it.
It depends on a lot of things. In general, I think caps are stupid, especially the way that we handle them. Events (concerts, sporting events, malls @ Christmas) crush us though.
We're going with remote radios as much as we can, for LTE, UMTS, and GSM.
LTE will launch with a single 10 MHz channel, 5 up, 5 down.