While I connecting my mobile with hotspot of other mobile and after connecting call, wifi connects but with error and internet does not work. I reset my mobile but no use. Can anyone suggest??

I am facing issue after updating Android 10 on my J8.1. Dual messenger app is not updating contact list.2. After switching off location it is blinking multiple time on screen.Please someone suggest me on above issue.

Why j8 battery is draining quickly?

How can add debit card on samsung pay mini to make payment thru card swapping machine.