Any DU'ers using AT&T for internet only?

Had a fast talking sales guy ring the doorbell a couple of months ago. I'd just ditched COX's cable service for YT TV but I still have their internet. The guy was telling me that 100Mbit service would be $50 per month plus taxes,I'm paying $84 to COX for 100 and not getting 100. He told me it would be a dedicated line and the speed wouldn't drop with traffic like HSI through cable,although that's never happened that much where I live.

Question too,can you use your cable modem or do they provide equipment?? Do they need to run a line,it can't be coming through the twisted phone wire--or can it??

Thanks!

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