S8 Network Issue

yes

plz contact Samsung customer care the will help

Yeah could be. Service center can help

Hope you are Not using Jio. Because, it's network stability is worst

I am facing same issue from today on Airtel

"Thanks for being with Samsung and for sharing your.
Let me recommend some steps to further isolate and determine what you are experiencing. Please be aware that device speeds may vary based on multiple outside factors. We would like to suggest you kindly follow the below mention steps to overcome the Issue:-
1) Ensure that network frequency of your device should be selected on Auto-mode.
Menu>Settings> Connections>More Networks> Mobile Networks> Network Mode> Select Auto mode (GSM/WCDMA/LTE).
2) Search for the Network Manually as follows:
Menu> Settings> Connections>More Networks> Mobile Networks> Network Operators> Select Manual Search.
3) You may check by exchanging the SIM in SIM slots.
4) Insert different SIM card in your mobile and check if the issue is resolved or not.
If still issue persists then we would suggest you to once contact with your service provider.
"

I am having this problem with my jio SIM card

same problem on my jio sim card too and i have to turn on and off airplane mode everytime i unlock mobile and the sim card works better on iphone .... this a 3rd replaced s8 any software issues ?