I appreciate your reply!
One option is using a device like a PC that’s completely disconnected from the Internet and has no wifi card installed.
Could this be a second option:
Install a special firewall app that I know for certain is 100% trustworthy and configure it to block both incoming and outgoing requests to the Internet? This way all the apps on the device would be 100% secure, however, I’d be putting a lot of trust and faith into that firewall app.
How would I know how to choose which firewall app to use?
Open source is usually my first choice, but then again, there are some premium firewall apps available that are expensive. I’d feel more confident in an expensive firewall app because I’d know that the company has a vested interest in keeping the firewall app secure?