I've been using mobile internet for last few years and whenever i would try to seed it'd be like 0.2 kb/s at best. I know that it's due to my dynamic IP (or whatever it's called) and i have closed ports.
Then i saw some people say that opening your ports makes your connection better/faster because you're able to connect not only to people with open ports, but closed ones aswell. Does it make sense download-speed-wise? Because how could i take traffic from someone who's unable to seed due to closed ports?
Yes, you would have to use a service like a VPN to open ports in that setup. You mentioned you USB tether from your phone. Do Russian providers use datacaps? Datacapping is common in the US, but almost non-existent in other parts of the world like EU territory, so I was curious. For US, it can be bypassed with TTL mangling on 4G LTE networks, but on 5G its a bit trickier and requires a GRE tunnel to be established between the phone and end device. Just curious if you guys have similar issues.
Honestly, the VPN would just be for opening ports for technical reasons, though. Russian VPN anonomity isn't really a thing, but that anonomity is only used to circumvent US copyright law and any international application of US laws (countries have their own copyright laws I understand, but the US does strong-arm countries into adopting more US-centric versions). If your host country does not recognize those things, then I would imagine that becomes a non-issue for you.
I pay like 7$/month for unlimited mobile data, but they do datacap and use very scetchy schemes aswell. I live in a countryside and we have 4G, but they offer you something called "pre-5G" for extra 4$. I tried it last month and obviously didn't feel much difference since it's the same 4G with a "higher priority, P2W". But this month i disabled it and now my speeds are so bad during the day. Lots of websites can be laggy and slow from time to time, they're literally forcing you to enable that thing back, even tho it wasn't as bad before i enabled it.
Speed-wise it can easily get 1.2-1.8 MB/s on torrents, so it's not that bad. But watching Twitch or Youtube can sometimes be annoying because connection can be pretty unstable during daylight, at night everything is perfect. And it's not because there's a lot of other people using mobile data in my area, i'm probably the only one who uses my certain provider here. They do deliberately "shape" the speed down for some reason and lots of people on russian forums complain about it.