UP TO DATE

First enable the Developer Options menu by going into Settings / About phone, and tapping the build number 7 times.
Then go into Settings / Developer Options, and enable USB debugging.

1. Connect to the Wi-Fi network
2. Bluetooth : Off
3. NFC : Off
4. Settings / Display :
   • Brightness level : 0 %
   • Adaptive brightness : Off
   • Sleep : after 30m
   • Screen rotation : Off (Portrait)
5. Settings / Sound : Disable all sounds
6. Settings / System / Gestures : Disable Quick launch Camera
7. Disable notifications
8. Disable Google Assistant (Ok Google)
9. Settings / Battery :
   • Power saving mode : Off
   • Ultra Power saving mode : Off
   • App power saving / detail : Off
10. Settings / Security :
    • Screen Lock : None
    • Location : Off
11. Settings / Security / Unknown sources : On
12. Chrome Settings / Home Page : Off
13. Other Security settings
    • Security policy update
      • Automatic update : Off
      • Wifi only : Off
14. Send security reports : Off
15. Usage data access
    • Google Play Services
      • Allow usage tracking : Off
    • Google Play Store
      • Allow usage tracking : Off
    • Smart Manager
      • Allow usage tracking : Off
16. Google Play (skip if no Google account is configured)
    - Notifications : Off
    - Auto Update apps : Off
    - Update Google services (otherwise the update popup will show up)