My note 9 reboots when I have the fingerprint scanner enabled. This happens when I unlock the lock screen. The fingerprint scanner functions normally for authentication in apps and such. It reboots after unlocking the phone. I have done several troubleshooting tips listed in previous posts but to no avail.
Does this happen if you don't unlock the device with the fingerprint scanner? Does this happen if your unlock your device with your fingerprint in safe mode?
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If i dont use the fingerprint scanner it works fine. I can simply unlock it with a code. If i use the fingerprint scanner even in safe mode it reboots.
In this case we would mean the whole account, you can do this under the settings under Backup and Accounts.
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I have deleted the account and created another fingerprint scan. Everything appears to be working fine. No reboots since this morning. I will consider the matter closed at this time. Thanks.
They've changed the directions slightly. If you follow the directions from google searches they probably won't work. Go to settings, accounts and backup, accounts, scroll down to your Samsung account, select personal info, select the three dot icon at the stop right and select sign out.
To all who see this, I also had this same issue. And I fixed it in just less than an hour.
The fingerprint scanner on the Note9's and S9's do seem to not like moisture. I powered my Note9 off, and rested it on it's screen on a flat surface.
I then took 99% rubbing alcohol and a Q-Tip and poured drip-sized amounts of alchohol on the Fingerprint sensor. I wanted to make sure the fingerprint sensor was neatly dressed in the alchohol and allow the alchohol to dry there.
Waited about 15 to 20 minutes and then powered the phone on. Set the fingerprint scanner to unlock the phone, and tested this 3 days before posting here. I no longer get random reboots.
Issue fixed.
If you try this yourself, make sure you use 99% alchohol. 70% has water mixed in which the sensor may clearly not like if the issue is really moisture getting in the sensor.
I tried this after seeing another user in another forum claim that he used rice to fix his sensor rebooting issue. Rice works but it takes longer.
