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Usually, your phone's ability to remember a Wi-Fi network is a good thing. It means you don't need to worry about remembering to hook up to your Wi-Fi every time you get home, or ask your friend for their Wi-Fi password every time you visit their house.
However, there are some occasions where your phone remembering a certain Wi-Fi network may be an annoyance. For example, if you went to a neighbor's house and used their network, your phone may still connect to it from time to time, giving you a very weak signal. Or perhaps you once hooked up to a free public network — it's probably better that your phone not automatically connect to that either, for security reasons.
Luckily, you can make your Android phone forget Wi-Fi networks very easily. When you do this, your phone will no longer automatically connect to the network when it's in range. If you do want to connect to it again, you'll need to manually select it and re-enter the password.
How to forget a Wi-Fi network on Android1. Open your Android's Settings app.
2. Tap "Network & internet."
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3. In the "Network & internet" menu, tap "Wi-Fi."
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4. Find the Wi-Fi network you want to forget, then tap the "Settings" button to the right of it.
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5. Directly under the name of the network, tap the trashcan icon labeled "Forget" to forget the network.
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- How to forget a Wi-Fi network on your Windows 10 device
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