Why does my mobile phone display the number of incoming calls by SMS instead of phone calls?

1. Maybe you didn't turn on the caller ID. Mobile phone 10086, Unicom phone 100 10. 2. There are many VoIP phones, and the number is not displayed when you call in. 3. If all incoming calls are not displayed, it is your phone. Sometimes the caller will hide the phone number. Because not everyone who calls you will hide his phone number. Go to the place where you bought your mobile phone and ask them to upgrade the software of your mobile phone. You just bought a mobile phone, probably because you haven't set it up yet. That's all I know. I hope it helps you. . .

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