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Since the 16.5.1 (c) update my keeps reverting to cellular data and then telling me the password is incorrect when I try to rejoin wifi. Restarting the phone works for a while but eventually it happens again. I’ve also noticed a slowness in data in general as well as the top third of my phone on the back opposite the camera running very hot at times.
iPhone 12 Pro Max
Check if this helps, see the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
Connect to Wi-Fi on your iPhone, iPad, or iPod touch - Apple Support
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support
Check the route settings -> Recommended settings for Wi-Fi routers and access points
Recommended settings for Wi-Fi routers and access points - Apple Support
If you need help with your Wi‑Fi password
If you need help with your Wi‑Fi password – Apple Support (UK)
or If you have iOS 16:
Go to -> Settings -> tap Wi-Fi -> tap on the hideen Password -> enter Passcode -> you will then see the Wi-Fi Password.
If they are On, turn Off Hotspot & VPN.
Check if this helps, see the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
Connect to Wi-Fi on your iPhone, iPad, or iPod touch - Apple Support
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support
Check the route settings -> Recommended settings for Wi-Fi routers and access points
Recommended settings for Wi-Fi routers and access points - Apple Support
If you need help with your Wi‑Fi password
If you need help with your Wi‑Fi password – Apple Support (UK)
or If you have iOS 16:
Go to -> Settings -> tap Wi-Fi -> tap on the hideen Password -> enter Passcode -> you will then see the Wi-Fi Password.
If they are On, turn Off Hotspot & VPN.
The Private IP Address option on iPhones can sometimes create reconnection difficulties with the Wi-Fi network.
Try the following on your iPhone
Tap Settings > Wi-Fi
Tap on the blue "i" next to the name of the Wi-Fi network
Scroll down and locate the setting for Private Wi-Fi Address
Turn it off
Then, power off your Wi-Fi router for a minute and then power it back up
Report on your results
iPhone 12 pro max keeps dropping wifi signal, then saying password incorrect when reconnecting
