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If I reset my Network Settings in iOS/iPadOS, and so lose all my WiFi networks/passwords, will my other iOS devices also lose them?

The reason I ask is that WiFi networks appear to be stored in the cloud (when one is entered into my iPhone, my iPad also seems to learn it). So if I erase my iPhone... will the ones in the cloud be forgotten? Or will my iPhone pull them back from the cloud?

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resetting network settings will remove all saved WiFi passwords in iCloud keychain, effectively deleting remembered WiFi networks from all your signed in devices. A workaround: turn off iCloud Keychain, then reset network settings, then turn iCloud Keychain back on. Your saved WiFi networks will then sync back, unharmed.

This is the behavior in devices running iOS 9 and later.

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No, reseting the Network settings only deletes all the network settings on that particular device.

Your different apple devices have your same Apple ID and your iCloud Keychain is synced on all those devices. So keychain syncs the passwords between all those devices.

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    If you have iCloud keychain enabled, the saved Wi-Fi passwords are wiped from all your linked devices with iCloud keychain enabled, similar to how saved password on one device syncs to another device. – Nimesh Neema Jul 18 at 18:08

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