OscarLicardie Said:
"IOS15.4.1 causing wifi to not work: recently updated devices to the latest version of IOS, before doing this my wifi was working perfectly. After completing the software update, my device is not allowing me to connect to the wifi network. [...]Does anyone have any ideas about how I may fix this?."
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Troubleshooting iPhone WiFi:
A. Restart the Router:
If there is no Wi-Fi signal, then apparently you have no IP address. So, start by restarting the router.
B. Clear Temporary Internet Files:
If connecting is unsuccessful, try clearing out your Temporary Internet Files: History, Cache, and Cookies
Go Here: Clear your Safari Browser History and Set Up Content Blockers on your iPhone, iPad, or iPod touch - Apple Support
C. Try manually restarting your iPhone:
- Go To: Settings
- Select: General
- Scroll to: the Very Bottom
- Select: Shut Down
- Slide Finger: to the Right
- Wait: 30 Seconds
- Power One: the iPhone
- Try this Once More
D. Troubleshooting Connectivity:
Wi-Fi: If your iPhone won’t Connect to a Wi-Fi Network - Apple Support
E. Disable, then Enable WiFi:
In Settings, try disabling Bluetooth, and then reenabling Bluetooth, seeing if that makes all the difference.
F. Reset All Network Settings to Default:
Example of items that will be reset: (Wi-Fi Passwords, VPN Connections, etc)
- Go To: Settings
- Tap: General
- Tap: Reset
- Tap: Reset Network Settings.
- Enter: [Your Passcode]
As a Last Resort:
F. Restore form a Backup:
Have a backup of your iPhone? If you are not concerned with losing data, then restore your iPhone from a backup that was made when Wi-Fi was working. Prior to restoring, always know to backup your iPhone, incase anything goes wrong in the future.