Protection against surveillance

[ignoramous]

@fria

enable the firewall on all your devices, on iOS and Android it’s on by default

What is ON on Android by default? A firewall?

@tiredMuppet

how they might be surveilling me and how I can protect my privacy

If the LEAs have physical access to where you live or your devices or your property, you’d have no choice but to replace all of it, and do so discreetly. As law-abiding citizens, there’s no permanent technological solution to socio-political problems; only Suits (like Jonah pointed out) & techniques (ex / ex / ex) with sharp edges. In extreme cases, there’s no choice but to flee the jurisdiction.