Hi
shashwatpandey2015@gmail.comThank you for your asking. Kindly provide the information below so that we can better assist you.
1. Have you encountered the issue after repaired your device from ASUS repair center?
2. Your current firmware version
Settings>System>About Phone>Software information>Build Number
If you try to update to the latest version, does the issue still persist?
3. Also, does the situation remains the same after performing "the Factory Reset"?
Settings>System>Reset options>Erase all data(factory reset)
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.