First off its AT&T, Inc not your "clever" AT&T-Mobile.
Second, it's AT&T IS (Internet Services) who deals with DSL & Uverse.
Third, AT&T Mobility is the wireless/mobile phone divison, which has zero to do with this UBB issue.
Lastly, the company will never be called AT&T-Mobile, it will remain as AT&T, Inc a holding company of the affilated company's previously purchased/merged with.