Not trying to backup YES or what not, but with 5G, it really boils down to several factors such as location, signal strength, type of modem router used. All telcos in MY under DNB are on the same radio bands, so if a tower is close by to your house, you should get a good enuff speed .... My ss as proof ...

Apartment building, 3rd floor. No speed cap, unlimited data (as long as you're connected to 5G). 4G usage will have a data cap of 100GB, after which when quota is finished, will capped your 4G speeds to 1MBps if not mistaken. Best to use a router that can lock band so that it doesn't drop to 4G on its own.