@shwetadixitsh just to advise you have posted on the eu Samsung Community Forum Section and not your own regions 😎
You don't mention which troubleshooting steps you've tried.
If the phone is dual sim try moving the physical sim to the ²nd slot.
If not 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.
Run the diagnostic tool found in your Samsung Members App to see if that highlights anything.
If you can try the sim card in another phone as a troubleshooting step to see if the sim itself is misbehaving.
A Samsung Service Centre can assess your phone.
If I can be of any further help then please don't hesitate. Take care. 😎
Daily Driver > Samsung Galaxy s²⁴ 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. "
