update

Make sure that your iPhone is setup to meet the following requirements before you attempt to update the iOS version-

• Your iPhone must have a fast Wi-Fi connection; you cannot update over cellular data or a cellular hotspot
• The iPhone can not be in Low Power mode
• The battery state of charge must be above 50%
• Your iPhone must have at least 6GB or more free storage space
• Your iPhone cannot be connected through VPN
• You should leave the phone plugged in until it finishes updating, both to assure that it remains above 50% and to keep Wi-Fi enabled (Wi-Fi turns off when the phone sleeps if not connected to power).

Axel F.

update Said:

"update: it says software update failed everytime i try to update my phone. i have checked and i have enough storage for it to be dowloaded"

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Use a Non-Public LAN:

Being connected to a Public LAN*, you are likely taking up too much data traffic for a single device. So, use a different WiFi LAN.

*Screenshot: