I don't know of any services that offer such but you might be able to make some kind of acoustic coupler or modem using the voice signal and dial into your PC at home before sending that out into the world via your home internet. I have never done it for android and it has been years since I did anything like it for a PC, it is however kind of how old school bbs type things worked.
I imagine you would want to have a rooted phone as well, though you might be able to trick it with some twist on VPN software that might not need root.
Edit. You might also want to look into some of the radio gateways. Most would have met it when radio -> telephone links were a thing and today most would likely be using sat phones but there might be a radio -> internet gateway setup you could twist to your end.
I should also say I would be surprised to hear it is against some flavour of terms of service as well as being slow as sin.