Dear Samsung Member,
Greetings from Samsung Customer Support!
To resolve your device hanging issue please visit this link: https://www.samsung.com/in/support/mobile-devices/how-to-restart-the-device-when-freezed-or-hanged/
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support
Repair App - No Data Loss
1. Turn Off Your Handset
2. Connect with Ear head or USB (Connected with PC/Laptop)
3. Hold Power & Volume UP Until recovery mode screen
4. Select Repair App
5. Once completed, Select Reboot