1 Find "Advanced"
Slide your finger downwards starting from the top of the screen.
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Press the settings icon.
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Press Network & Internet.
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Press Mobile network.
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Press Advanced.
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2 Select network manually
Press the indicator next to "Automatically select network" and wait while your phone searches for networks.
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Press the required network.
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3 Select network automatically
Press the indicator next to "Automatically select network".
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4 Return to the home screen
Press the Home key to return to the home screen.
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