I had a similar experience. Higher resolution netflix on my T-Mobile prepaid data line with warp installed.
Additionally I did the bog standard TTL modification, installed warp and probably one or two other things I can't recall. For whatever reason those changes allowed me to tether unlimited 4G speed data rather than being throttled down to 3G after a few gigs. This was true for T-Mobile, US Mobile's "verizon" tower mvno service as well as US Mobile's "t-mobile" tower mvno service. Can't say I was upset about it.
Additionally I did the bog standard TTL modification, installed warp and probably one or two other things I can't recall. For whatever reason those changes allowed me to tether unlimited 4G speed data rather than being throttled down to 3G after a few gigs. This was true for T-Mobile, US Mobile's "verizon" tower mvno service as well as US Mobile's "t-mobile" tower mvno service. Can't say I was upset about it.