Take Samsung S8 as an example, the specific steps are as follows:

1. First, turn on the setting function option on the mobile phone, as shown in the following figure.

2. after entering the setting page, click and enter the "display" option.

3. after entering the display page, slide up to find and click the option of "curved side screen", as shown in the figure below.

4. after entering the curved surface side screen page, click the "side screen flashing" option.

5. Just turn on the switch button on the right side in the side screen flash, as shown in the figure below.

6. Finally, you can choose the time when the display screen flashes on as needed, such as "When the screen is on", "When the screen is off" or "Always".