1. Update to the latest iOS version
  2. Disable Background App Refresh
  3. Reduce Transparency and Motion
  4. Remove Unused Apps
  5. Minimize widgets
  6. Delete Old Photos and Videos
  7. Disable Location Services
  8. Turn Off Automatic Updates
  9. Disable Siri Suggestions
  10. Disable Dynamic Wallpapers
  11. Disable Automatic Downloads
  12. Turn off iCloud Keychain
  13. Adjust Brightness
  14. Disable AirDrop
  15. Clear Safari Cache
  16. Disable Parallax Effect
  17. Clean up notifications
  18. Disable Auto-Brightness
  19. Remove Unused Contacts
  20. Turn Off Handoff
  21. Turn off Hey Siri
  22. Clear App Store Cache
  23. Disable Siri App Suggestions
  24. Turn off Raise to Wake
  25. Clear Up RAM
  26. Disable in-app Purchases
  27. Delete Old iMessages
  28. Turn off iMessage Effects
  29. Optimize Battery Usage
  30. Delete Unused Voice Memos
  31. Turn off Siri Suggestions in Spotlight
  32. Clear Up Space
  33. Disable Apple Music Access from Lock Screen
  34. Turn Off Auto-Downloads of Podcasts
  35. Disable iCloud Backup
  36. Remove Unneeded Ringtones and Vibration Patterns
  37. Delete Unused Health Data
  38. Disable Send with Effect in iMessage
  39. Disable Automatic Downloads for Podcasts
  40. Remove Old iCloud Backups
  41. Turn off iCloud Photos
  42. Disable Siri Suggestions in Search
  43. Clear Up Music Library
  44. Turn Off auto-Downloads for Books
  45. Turn off Siri Web Search
  46. Remove Unneeded Voice Feedback
  47. Disable Data Roaming
  48. Turn Off iCloud Drive
  49. Clear Up Stocks, Weather, and News Widget
  50. Disable iCloud Backup for Apps