Sprint has been getting building permits in my area for a few months at various tower sites, and some of them are listed as antenna upgrades. I know they have been busy adding fiber connections, and Clearwire was helping to replace radios and t-line at sites, with a controller that sits in the shack, and is connected to a radio at the top of the tower, and is fed by fiber going up the tower, then the t-line is really short. I see and hear alot of this stuff as my company built out, and operated about 800 sites for Sprint, then later sold the towers to tower companies, and then the network to Sprint. Much of the work involves adding LTE. We sold some 700Mhz spectrum we owned to AT&T, and they are putting in more data with it as well.
Nextel...the end of an era. Nextel in it's heyday was the only carrier in the black, with the highest retention, ARPU and lowest CPGA in the business...then Sprint got their hands in it....lol.