And because they need to find how to fund a national overhaul of their network which they will need in 2-5 years from now (yeah, that kind of overhaul a company heavily bashed here is doing right now)
The overhaul will be replacing their legacy 3G equipment (AT&T will discontinue EDGE in a few years), replace antenna, wiring, and adding more backhaul in order to modernize their infrastructure and reduce costs related to network maintenance and roaming (yes, they do pay roaming access to several regional carriers). This is the exact same thing Sprint is doing nationwide, as well as deploying LTE simultaneously. It's not just installing LTE equipment as the other three carriers are doing.
Good for AT&T. They've come a long way from 2009 when their network was heavily congested. They're actually rolling out LTE a lot faster than I expected.
Why is Sprint heavily bashed here? Because no WP8 phones? Aren't you the person who said Microsoft's CDMA coding wasn't up to Qualcomm standards?
At first I thought the bashing was about their slow data speeds, but that wouldn't make sense since their only Windows Phone was the Arrive.