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Cause 3 of 6: Wi-Fi Assist is turned on
If Wi-Fi Assist is turned on, your phone will use mobile data when the connection to the Wi-Fi network is poor.
Solution: Turn off Wi-Fi Assist.
Find "Mobile Data"
Press Mobile Data.
Turn automatic use of mobile data on or off
Press the indicator next to "Wi-Fi Assist" to turn the function on or off.
Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
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