Show HN: Wa-tunnel – HTTP Tunneling through Whatsapp
Termux is such an awesome hidden gem for tunneling cell data.  My carrier doesn't allow wifi hotspot use on my phone (and android happily enforces their rules), but I can run sshd on termux and SOCKS5 proxy to my laptop with ssh. It's instant wifi tethering to my laptop without my carrier knowing or blocking it. I can even use adb networking and a USB cable if the laptop can't connect to the phone over wifi for some reason.