Android settings for performance, security and privacy

1.  Network & internet
1. Internet
1. SIM card
1. Roaming - Off (unless your contract is covered for roaming)
2. Data warning & limit - set to cap at your contract
3. Allow 2G - Off
2. Network preferences
1. Turn on Wi-Fi automatically - Off
2. Notify for public networks - Off
2. Airplane mode - On (when you have Wi-Fi Calling enabled. Texts and calls will still come through.)
3. Hotspot & tethering - Off
4. Data Saver - On
5. VPN - Off (when using whole-LAN VPN or a VPN app instead)
6. Private DNS - Automatic, unless you have a preference
7. Adaptive connectivity - Off
2. Connected devices
1. Connection preferences
1. Bluetooth - Off when not in use
2. NFC - Off when not in use
3. Nearby Share - Off
3. Apps
1. All apps
1. For each app, change the settings for:
1. Notifications - Off
2. Mobile data & Wi-Fi
1. Background data - Off (except for messaging apps)
2. Unrestricted data usage - Off (except for messaging apps)
3. Battery - Restricted (Optimized for messaging apps only)
4. Remove permissions and free up space - On
5. Install unknown apps - Not allowed
4. Notifications
1. Bubbles - Off
2. Notifications on lock screen - Don't show any notifications
3. Do Not Disturb
1. Schedules
1. Sleeping - On (12PM - 7AM)
4. Wireless emergency alerts - Allow alerts (all enabled)
5. Enhanced notifications - On
5. Battery
1. Battery Saver - On
2. Adaptive preferences - Adaptive Battery - On
3. Battery percentage - On
6. Sound & vibration
1. Set to vibration only
2. Vibration & haptics
1. Vibrate for calls - Always vibrate
2. Ring vibration - On
3. Notification vibration - Off
3. Dial pad tones - Off
4. Screen locking sound - Off
5. Charging sounds and vibration - Off
6. Touch sounds - Off
7. Touch feedback - Off
7. Display
1. Adaptive brightness - On
2. Lock screen
1. Privacy - Show sensitive content only when unlocked
2. Show wallet - Off (if unused)
3. Show device controls - Off
4. Now playing - Off
5. Always show time and info - Off
6. Tap to check phone - Off
7. Lift to check phone - Off
8. Wake screen for notifications - Off
3. Screen timeout - 5 minutes
4. Dark theme - On
1. Schedule - Turns on from sunset to sunrise
5. Night Light - On (10PM - 7AM)
6. Auto-rotate screen - Off
7. Smooth display - Off
8. Increase touch sensitivity - Off (Unless using a screen protector)
9. Screen saver - Off
8. Accessibility
1. Extra dim - On
2. Text and display - Remove animations - On
9. Security
1. Screen lock - Password
2. Device admin apps - No active apps (Unless required by antivirus etc)
3. SIM card lock settings - Lock SIM card - Off
4. App pinning - On (Familiarise with using when letting someone borrow your phone)
10. Privacy
1. Show passwords - Off
2. Notifications on lock screen - Don't show notifications at all
3. Autofill with Google - Off (Use a password manager app instead such as KeePass)
4. Ads - Opt out of Ads Personalization - On
5. Usage & diagnostics - Off
11. Location - Off (only use when needed)
1. Location services
1. Wi-Fi scanning - Off
2. Bluetooth scanning - Off
12. Safety & emergency
1. Emergency information - Fill out
2. Emergency SOS - On (Familiarise with usage)
3. Emergency Location Service - On
13. Passwords & accounts - Don't use Google
14. System
1. Gestures
1. Quickly open camera - On
2. System navigation - 3-button navigation
3. Press and hold power button - Hold for Assistant - Off
2. Backup - Back up to Google Drive - On (if you trust Google and make backups of your Google account, Off if you have a different backup solution)
15. About
1. Take a screenshot of your IMEI