➡️ iPhone 8 or earlier :
1. Press the Power and Home buttons at the same time.
2. Hold them for a couple seconds and let go.
3. Open your Camera Roll photos where screenshots are saved automatically.

➡️ iPhone X and newer :
1. Press the Power and Volume Up buttons at the same time.
2. Hold them for a couple seconds and let go.
3. Open your Camera Roll photos where screenshots are saved automatically.