I believe their towers prioritize cell data over their "5G" internet. I tried it out for a couple months because my local ISP was really awful and I wanted to finally stick it to them.... but, T-Mobile internet was significantly worse.
And when it worked, it was usually great... at least 200mbps, no buffering for videos, no issues. There were a lot of outages or times when it might as well be out, a lot of ****ing with the trash can for different settings, placing it around the house, etc. Several times I'd tether to my 4G T-Mobile phone and it was significantly faster than the internet, probably using the same tower.
And I don't want to shit on it, really.... if you have the chance to stick it to your ISP, it's 100% worth a chance. IMO, it's worth trying it out with your ISP still around as a secondary, at least for a few months before you tell your ISP to GTFO.
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