tmo is a combination of TTL and APN. Stock android and iOS will use the tethering APN under the hood. LineageOS doesn't. I'm presently tethered to a tmo phone

tmo is a combination of TTL and APN. Stock android and iOS will use the tethering APN under the hood. LineageOS doesn't. I'm presently tethered to a tmo phone on their cheapest unlimited data plan and see 20mbit+