Pros
At this time AT&T is slashing labor costs as well as consolidating management personnel around Dallas and Atlanta (and some DC, etc.) and doing this by elimating jobs outside of these cities and posting new (and fewer) jobs in these cities. If you’re willing to work in one of these locations you might have the opportunity to pickup responsibilities and gain visibility - and potential for advancement - faster than typical if you let AT&T lean on you as it settles into some sort of new norm. And while it’s not a hot tech company like some others it has instant and national brand recognition which wouldn’t be bad for your resume, depending on your role and ambitions.
Cons
At this time AT&T is slashing labor costs as well as consolidating management personnel around Dallas and Atlanta (and some DC, etc.) and doing this by elimating jobs outside of these cities and posting new (and fewer) jobs in these cities. If you’re willing to work in one of these locations you might have a lot dropped on you with limited recognition while the company finds a new equilibrium. That includes the potential of being caught in the next round of cost costing. Depending on your role and ambitions AT&T’s name may not have the same cache it may have once had.