Note 8

the problem will be fixed soon as it has been just updated

I suggest you to
1. update your device from setting >software update if avalable.
2. use your device in safe mode for some time if you are facing some issue

Safe Mode allows the device to boot up without  installed third party apps running, which will conserve battery power. 

 

To start the device in Safe Mode, with the device Powered Off.

① Press and hold Power key.

② Once the animation starts, Press and hold the Volume down key until the lock screen appears.

③ Keep the Volume down button until device boots up.

④ Safe Mode is indicated in the lower left hand side when enabled.

⑤ To get out of Safe Mode restart the device.

if your problem is not solve you can ask again
 you can also call Samsung Customer Care Number 1800-40-726-7864
if you find my answer useful please hit the  ❤ option. and follow me
i am happy to help you

Hello sir after reviewing your problem I kindly suggest you to hard reset your device which will eventually solve the problem.

thank you I hope this solves your problem.

Thanks for being with Samsung and for sharing your Concern.

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 mentioned 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 by the steps as mentioned:

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.

Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/