i read a few of these. and you forget one major thing
when they buy a company, they acquire all their infrastructure.
a buyout is a fast and easy way to quickly upgrade. it may not be the most cost efficient, but it does wonders in a time constraint.
now i would love to see these people upgrade, but again, its all about cost efficiantcy.
if i headed a big company like them, i wouldnt upgrade a damn thing till that thing at the very least payed for itself twice over.
you have to realize that you cant just dump your cell towers and get new ones imediatly. if it were me i would have a 10 year cycle for towers in rural areas, and probably a 2 year cycle in cities. and a 6 month in major metropolitan areas, possibly a year long but somewere reasonable.
i dont expect at&t to be great, but i expect upgrades to happen.