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How does iphone view wifi usage traffic?

1. First, turn on the phone, and click Select to open the Settings application button.

2. Then click and select the "Cellular Mobile Network" button in the new interface.

3. Then click and select the software to view the traffic usage in the new interface.

4. Then click and select the "WLAN" button in the new interface.

5. Finally, you can see the usage of wifi in the new interface.