Hello @Members_rNatDA1 and may I extend a Warm Welcome to the Samsung Community Forum Section for Uk and Eu Members 👋
Try a forced reboot by holding down the volume down key and power button simultaneously for more than 7 seconds to restart it. When your phone resets, you will feel it vibrate.
Can you eject the sim card and wipe the chip with a soft microfiber cloth, and resit it back into the phone, and then see what happens.
If you have a duel sim phone model perhaps try the sim in the alternative sim slot.
You could also try >
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 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 }
And
Safe Mode > https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ turns off downloaded apps and themes etc which may highlight an app or theme that's causing conflict. Alternatively long press the power off button and then long hold on Turn Off to get to Safe Mode.
There is a diagnostic test tool found in your Samsung Members App.
Samsung Help Links >
https://www.samsung.com/uk/support/mobile-devices/how-to-troubleshoot-mobile-data-issues
Issues with mobile network connection on Samsung phone or tablet.
If you perform a forum search you may find existing threads with some further help or guidence within.
If i can be of any further help please don't hesitate to ask 😎
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
