I recently set up a VPN on my home router. It creates an OpenVPN tunnel for my phone to connect through while it's on 4G.
The reason I do this is that I trust my ISP at home (They have less than 10,000 customers and are locally owned and operated) and I DON'T trust my Verizon-based MVNO.
It's just fun to set up a VPN. I recommend everyone do it. Haha