Galaxy Note 9: What to do if the device is freezing and does not respond to the touch screen?
If your device is frozen and unresponsive, you may need to close apps or turn off the device and turn it on again. If your device is frozen and unresponsive, press and hold the Power key and the Volume down key simultaneously for more than 7 seconds to restart it.
1. Use the Galaxy Note9 Device maintenance menu to help optimize the device and check for “Malware” . (SMART Manager may not be available depending on the region or service provider)
2. Create Memory Space.
3. Check for software updates for your device.
4. Check your device in "Safe Mode".
5. Perform a factory data reset of the device. Before performing the factory data reset, remember to make a backup copies of all important data stored in the device.
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