If you value your anonymity and your privacy, don't stick with a "free" VPN.  Nothing is every free and most likely they will monetize you somehow.  VPNs are cheap, usually $3-$5 a month and many you can buy using gift cards so there isn't even a paper trail leading back to you.

Things to look for when choosing a VPN.
1. Lots of geographical locations to choose where your IP address looks like it's coming from so you can get around these pesky geographical issues like with TER.
2. You want the VPN to encrypt all your internet traffic so your ISP or phone company has no idea what website you're looking at or what you're doing on it.
3. You want a VPN that does NOT keep logs of any kind.  This is important so if they get raided, they don't have any incriminating info to give.
4. Speed.  Since all your internet traffic will be moving through the VPN, you don't want it to artificially slow your internet experience down.  So make sure they have a lot of vroom.
5. Payment options - some VPNs allow you to pay using anonymous gift cards.  Good if you want to leave no paper trace of you ever using a VPN

Here are links to two real good VPNs
https://nordvpn.com/
https://www.privateinternetaccess.com/