How does itunes update the existing software on the iphone?

To use itunes to update existing software on the iphone, follow these steps:

1. First, download and install an Apple iTunes software on your computer.

2. Connect the data cable of Apple's mobile phone to the USB interface of the computer, open the iTunes software in the computer, and click the iTunesStore to enter.

3. Then log in to the AppleID of the Apple phone.

4. Open the purchased item.

5. Look at the mobile phone software that needs to be updated in Apple's mobile phone, and click the cloud button to download it.

6. During the download process, you can click the down arrow at the top to check the download progress. Access the database after the download is completed.

7. Open the iPhone, enter the application, and press the software to be updated in the application software column.

Extended data:

How to use the health software that comes with Apple mobile phone?

1. After opening the "Health" application for the first time, the chart summary of the health application will be displayed, and it can be seen that there is no relevant data displayed at present. Please click on the "Health Data" column at the bottom.

2. There are many data categories in the list of health options. Here, we choose to add "fitness data" as an example.

3. In the classification of fitness data, you can directly use the number of steps, running distance and climbing floor of the data captured on the mobile phone.

4. Take adding "steps" statistics as an example. After clicking Open, please select the "Show summary on chart" option.

5. Then go back to the icon summary column of the health application, and you can see the statistics of the steps of the day, and of course you can also view them by week, month and year.

6. Take statistical steps as an example. Click Open, and then click "* * * Enjoy Data" option.