Earlier iPhone models (click on your model to download iOS 10.3.1):

What's New in iOS 10.3.1:

Find My iPhone

  • View the current or last known location of your AirPods
  • Play a sound on one or both AirPods to help you find them

Siri

  • Support for paying and checking status of bills with payment apps
  • Support for scheduling with ride booking apps
  • Support for checking car fuel level, lock status, turning on lights and activating horn with automaker apps
  • Cricket sports scores and statistics for Indian Premier League and International Cricket Council

CarPlay

  • Shortcuts in the status bar for easy access to last used apps
  • Apple Music Now Playing screen gives access to Up Next and the currently playing song’s album
  • Daily curated playlists and new music categories in Apple Music

Other improvements and fixes

  • Rent once and watch your iTunes movies across your devices
  • New Settings unified view for your Apple ID account information, settings and devices
  • Hourly weather in Maps using 3D Touch on the displayed current temperature
  • Support for searching “parked car" in Maps
  • Calendar adds the ability to delete an unwanted invite and report it as junk
  • Home app support to trigger scenes using accessories with switches and buttons
  • Home app support for accessory battery level status
  • Podcasts support for 3D Touch and Today widget to access recently updated shows
  • Podcast shows or episodes are shareable to Messages with full playback support
  • Fixes an issue that could prevent Maps from displaying your current location after resetting Location & Privacy
  • VoiceOver stability improvements for Phone, Safari and Mail

Previous versions:

Apple iPhone iOS 10.2.1 Firmware Update

Apple iPhone iOS 10.2 Firmware Update

Download links for iOS 10.1.1 (previous version) 2016-11-01:

Download links for iOS 10.1 (previous version) 2016-10-25:

Download links for iOS 10.0.2 (previous version) 2016-09-23:

Download links for iOS 10.0.1 (previous version) 2016-08-25:

Download links for iOS 9.3.5 2016-08-25:

Download links for iOS 9.3.4 2016-08-04:

Download links for iOS 9.3.3 2016-07-19:

Download links for iOS 9.3.2 2016-05-16:

Download links for iOS 9.3.1 2016-04-04:

Download links for iOS 9.3 2016-03-22:

Download links for iOS 9.2.1:

iPhone 6s Plus (iPhone 8,2)
iPhone 6s (iPhone 8,1)
iPhone 6 (iPhone 7,2)
iPhone 6 Plus (iPhone 7,1)
iPhone 5s China (iPhone 6,2)
iPhone 5S GSM (iPhone 6,1)
iPhone 5C Global (iPhone 5,4)
iPhone 5C GSM (iPhone 5,3)
iPhone 5 Global (iPhone 5,2)
iPhone 5 GSM (iPhone 5,1)
iPhone 4S (iPhone 4,1)

Download links for iOS 9.2:

Download links for iOS 9.1:

Download links for iOS 9.0.2:

Download links for iOS 9.0.1:

Download links for iOS 9.0:

Download links for iOS 8.4.1:

Download links for iOS 8.4:

Download links for iOS 8.3:

Download links for iOS 8.2:

Download links for iOS 8.1.3: