Android users personalize wallpapers, lock screens, ringtones, and notification sounds with built-in tools or free apps—no root required. Here’s how in under 400 words:

1. Wallpapers & Lock Screen

1. Set Different Wallpapers Long-press home screen → Wallpapers → pick image → choose Home screen, Lock screen, or Both.
   • Pro tip: Use Google Wallpapers or Backdrops (Play Store) for 4K/AMOLED collections.
2. Live Wallpapers Go to Wallpapers → Live Wallpapers → select (e.g., Wave Lines, Fluid Simulation).
   • Advanced: KLWP (Kustom Live Wallpaper) lets you create animated, data-driven walls (clock, weather, music visualizer).
3. Lock Screen Customization
   • Android 14+: Settings → Display → Lock screen → edit:
     • Clock style (bold, analog, stacked)
     • Add shortcuts (camera, flashlight)
     • Show/hide notifications
   • Samsung (One UI): Settings → Lock screen → Widgets (music, weather, calendar). Use Good Lock > LockStar for full layout control.
4. Always-On Display (AOD) Settings → Lock screen → Always On Display → customize clock, add image, or use Energy Ring (battery ring around punch-hole camera).

2. Ringtones & Notification Sounds

1. Built-in Method
   • Ringtone: Settings → Sound & vibration → Phone ringtone → pick from system list or + Add ringtone (choose MP3 from Files).
   • Notifications: Same menu → Default notification sound → select or add custom.
   • Per-app sounds: Settings → Apps → [App] → Notifications → Sound → pick unique tone.
2. Per-Contact Ringtones Open Contacts → select person → Edit → More → Ringtone → assign custom.
3. Zedge (500M+ downloads)
   • Download ringtones, alarms, or notifications (search “lofi beep”, “retro game”).
   • Tap Set → assign to ringtone, contact, or app.
4. Custom Audio Files
   • Save MP3/OGG to Internal Storage > Ringtones (create folder if needed).
   • It auto-appears in sound picker.
5. Haptics (Vibration) Settings → Sound & vibration → Vibration & haptics → adjust intensity.
   • Zedge or Vibration Apps offer custom patterns (e.g., Morse code for texts).

Quick Power-User Combo (No Root)

• Wallpaper: KLWP (animated, reactive)
• Lock Screen: Good Lock (Samsung) or Frontface (custom widgets)
• Sounds: Zedge + per-app tones
• Bonus: Tasker auto-swaps wallpaper/sound based on time/location.