Disconnect networks

[Khalilqaisi]

I have disconnected for data and wifi network many times in a day

[BandOfBrothers]

As a process of elimination try your sim card in another phone @Khalilqaisi 

You can also reset your network settings too in general management.

If I can be of any further help then please don't hesitate. Take care.  😎 

[Wharncliffeowl]

Try a safe reboot by pressing the power button and volume down at the same time. Phone will power up in safe mode. Then power off the phone and restart it normally. It might just clear out some rogue setting.