Try the AT&T Forum that covers your service area and they should be able to answer a lot of your questions (if not all of them
). They have a pretty helpful group of techs here at BBR despite what corporate does.
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AT&T Forums (AT&T Direct, AT&T Midwest, AT&T Southwest, AT&T Northeast, AT&T Southeast, AT&T Southeast, AT&T West, AT&T U-verse)