Samsung a5r's own weather forecast is not allowed to be changed.

Take Samsung S6 mobile phone as an example, the operation is as follows:

1. Pull down the menu bar at the top of the mobile phone screen to open the "GPS" positioning system.

2. Go back to the phone desktop and press in the blank space.

3. Select the "Widget" button and click.

4. Find the Weather component in the list.

5. Select the weather style template, press and drag it to the corresponding position, and then release it.

6. After the weather is set, it will be displayed on the desktop. If you are connected to the Internet, you can click the button behind the time to update manually.