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Why my iphone turn to 3G when I’m using phone call

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Contributing Citizen ✪

Why my iphone turn to 3G when I’m using phone call

Is it normal my iPhone turn to 3G when I’m using phone call??

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Contributing Citizen ✪

Re: Why my iphone turn to 3G when I’m using phone call

because you are using 3g/4g/lte signal for your data stream. voice cannot be made in lte mode because the telco doesn't support volte, thats why when you are making a phone call, your signal being changed to 3g