- 1 A smartphone isn't a secure dispositive
- 2 It's not a good idea to store sensitive data in a smartphone or using it for banking or with pay apps
- 3 Disconnect the GPS, if you don't need it
- 4 Use a good AV , p.Exmpl. [BitDefender](https://www.bitdefender.com/solutions/antivirus-free-for-android.html) (Free version is enough), because Google Play Protect is only a better placebo
- 5 Review the permissions of the apps and remove those which are not needed for the app (Candy Crush don't need access to your camara or mic, f.Exmpl.)
- 6 Prefer apps from [F-Droid](https://f-droid.org)
- 7 Use [Exodus Privacy](https://exodus-privacy.eu.org/en/) to check the apps before download or using.
- 8 Use a VPN if you are on a public WiFi, but be aware of the most free VPN, there are few exceptions of thrustworth free VPN, you can use
- [Proton VPN](https://protonvpn.com/free-vpn/android) (no logs, no data limit, encrypted end2end, developed by Suiss CERN scientifics.
-[Windscribe](https://windscribe.net/vpn-for-android) (same as Proton, but only 10 Gb/month)
- [Calyx VPN](https://calyx.net) (No logs, encrypted, no data limit, but only one server from the Calyx Institute)