I can't update iOS on my iPhone

Go to Settings/General/About and note the iPhone Model Name, then check its version compatibility from this list:

• iPhone XR, XS, SE 2nd or 3rd edition, iPhone 11 and newer: You can update to iOS 17.1
• iPhone 8, and iPhone X you can update to 16.7.2
• Any iPhone series 6S and 7, and original SE: You can update to 15.8
• iPhone 5S or 6: You cannot update to iOS 13 or higher; you can update only to iOS 12.5.7
• iPhone 5: You can update only to 10.3.4
• iPhone 5C: You can update only to 10.3.3
• iPhone 4S: You can update only to 9.3.6
• iPhone 4: You can update only to 7.1.2

If your phone is eligible to be updated go to Settings/General/Software Update and follow the instructions.

To update over the air from the phone all of these requirements must be met:

• To update over the air from the phone all of these requirements must be met:
• You need at least 10 GB of free storage for iOS 16 and later or 6 GB for iOS 15 or lower; more is better
• You must be connected to a Wi-Fi network (and not a personal hotspot) unless it is an iPhone that supports cellular 5G (12, 13, 14, 15 or SE 3rd edition) and has a 5G network connection
• The phone must be charged to at least 50%, and preferably plugged in so it stays above 50% during the update
• The phone must not be in Low Power Mode
• The phone must not be connected through VPN, and it may be necessary to delete any VPN apps and VPN profiles
• The phone cannot be in Airplane mode and must have a cellular data connection
• You cannot still have a beta of a previous version installed on the phone
• You cannot have a previous version that was downloaded, but not installed - go to Settings/General/iPhone Storage to look; if you find an iOS installer, delete it

If you can't meet all of them you can still update using your computer.