Strange behaviour after latest update

[JoseAlmeida]

My samsung s24 ultra after this last update is behaving in a weird way.

Sometimes restarts by itself and now start playing sounds from nowhere, no application, nothing.

Help...

[AndrewL]

@JoseAlmeida: Do you have NFC enabled on the device, or a case/cover containing bank cards? If so, try disabling NFC, or removing the case/cover temporarily, to see if you notice an improvement, as the sounds you're hearing could possibly by the NFC reader scanning the cards. 

Regarding the restarts, please try heading to Settings > Device care > Auto optimisation > Auto restart, and toggle of 'Restart when needed' or 'Restart on schedule', if applicable. I also recommend uninstalling any recently added applications to ensure that the issue is not stemming from an external source. 

[BandOfBrothers]

@JoseAlmeida also you could try >

1. Https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ 

2. Clear Cache Files from the phone's System Partition Section  > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop or use a Tv's USB Port or a usb-c to usb-c phone to phone set up to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too { Possibly excluding the s²⁴ Series of phone's } 

If i can be of any further help please don't hesitate to ask  😎 

[johnz237]

If its after an update

clear the cache, as older versions may be bugging the phone. Plug the phone into a PC, then turn off the device-your device won't boot to Recovery Mode when it's on. Press and hold the Volume Up key and Power key. Once the Android Recovery screen appears, release the buttons. Use the Volume Down button until you are highlighting "clear cache partition." Press the Power button to select "Wipe cache partition." Use Volume Down to highlight Yes. Press the Power button to confirm the action to clear the cache. Wait a second as the system wipes the cache. Press the Power button again to reboot the device

[BlueEyedBabyBear]

I'm glad I came across this thread because ever since the security update a few days ago as of a little after 2:00 a.m. this morning my phone has randomly started powering itself off and on mostly off and sometimes will not even start in safe mode. The other thing that literally a few days before the update was turned on NFC. So I turned that off and I'm Praying that fixes my issue.🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻