You will need a non-logging, paid VPN like Private Internet Access (
https://www.privateinternetaccess.com/) It's $40/year or $80 for three years. Also allows up to 5 simultaneous devices, so you can use it on your pc and phone at the same time.
Get the app, connect to a server. That covers what your phone/isp can see. They will only see that you are connected to the vpn, which acts as a middle man between you and the sites you visit.
For a browser, I only use Firefox in private mode for ss (both mobile and on PC). Maybe the others are fine, but I would rather be 100% sure with this site.
PM me if you have any specific questions for your devices.