1: 1. Customize your home screen with widgets and shortcuts for easy access. 2. Use Samsung's Game Booster feature to enhance your gaming experience. 3. Enable Power Saving Mode to extend your battery life.

2: 4. Utilize Samsung Pay for convenient and secure mobile payments. 5. Use the Secure Folder feature to keep your private files and apps secure. 6. Take advantage of Samsung's Smart Switch tool for effortless data transfer.

3: 7. Use Multi-Window to run two apps simultaneously for increased productivity. 8. Take stunning photos with the Galaxy A15's impressive camera capabilities. 9. Enable Dark Mode to reduce eye strain and conserve battery power.