1. Find "Voice & Data"
Press Settings.
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Press Mobile Data.
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Press Mobile Data Options.
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Press Voice & Data.
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2. Select network mode
To use 4G for both voice calls and mobile data, press 4G, VoLTE On.
You can use 4G for voice calls via the mobile network for a faster and better connection.
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To use 4G for mobile data only, press 4G, VoLTE Off.
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To turn off use of 4G, press 3G.
Your phone automatically switches between 2G and 3G depending on whether you have 3G network coverage or not.
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3. Return to the home screen
Press the Home key to return to the home screen.
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