So no internet at home and you use 4G connection from phone as a hotspot to get the PC to the net. Quite interesting setup are you on unlimited data plan? Does it exist such a thing?
Anyway that's out of topic. To your question now. I'm not really sure if a VPN will solve your issues as most
trackers will NOT allow to sign up through a VPN/proxy.
I could suggest a
seedbox, or a VPN for either the phone (not sure how a VPN behaves on a phone when it's acting as a hotspot) or the PC.
But in the end it might be better to use the money for an ADSL/VDSL landline which will solve all your problems
don
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