I think I noticed something similar back in the day with Straight Talk (ATT). Speeds when tethered were much worse than on my phone with most of my modern lapto

I think I noticed something similar back in the day with Straight Talk (ATT). Speeds when tethered were much worse than on my phone with most of my modern laptops, but when I tried IE on an old XP install I had I saw significantly faster speeds than my phone/plan were supposed to be capable of.