Verified answer

See the link below for the U-Verse remote code list. Notice that LG appears under two headings, "TV" and "HDTV."

I would start with the 3 codes under "HDTV" since you have a fairly new HD set. If none of those work, start with the codes in the other column, under "TV."

LG is a major brand, so it's reasonable that AT&T is going to have your code somewhere on this list. I used it with three other sets (Vizio, Samsung, Sharp) with no problem.