How to turn on the step counting function of Apple's mobile phone?

It can be opened by the following steps:

1. Open the main screen of Apple's mobile phone, find and click the "Health" application.

2. Select the "Today" tab in the bottom navigation bar.

3. Click the "Step" icon in the upper right corner of the screen.

4. If it is the first time to use the step counting function, you will be prompted to allow the "Health" application to access your exercise and health data, and click "Allow".

5. Then, you will see a chart showing your steps every day. On this page, you can view your step statistics, activity time and distance.

6. If you want to quickly check your steps on the home screen, you can press and hold the blank area on the home screen, select "Widget" and add "Health”Widget.