You might want to connect to Wi-Fi instead of using mobile data sometimes. This can help if you don’t get a good cellular signal in some places or have a limited mobile data plan.
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On your Home screen, tap Settings.
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In Settings, tap Network & internet > Internet, then turn on Wi-Fi.
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Tap the name of a Wi-Fi network you recognize and trust.
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Enter the Wi-Fi network password, then tap Connect.