Unable to hang up the call by clicking the cancel (red) button sometimes. Its a random issue. When I install the latest update, I get black blank screen after calling a number or a contact. It looks permanent issue with the update. I tried app cache clear and storage clear but it didn't work as expected. Mine is a brand new mobile and am using it for a week. For reinstalling the app, I don't see any option for uninstall which is very disappoiting one in a stock Android mobile. Pls fix this ASAP