In my M21 unable to find dual massanger file location , in storage there is a folder named Daul massanger but inside it there is nothingBut in whatsapp chat files are showing

i was also facing same issue, and i found solutionsit was hapenning because once i have disabled the whatsapp notifications which disbale all notification including call notifications.simply go to setting- apps- whatsapp- and turn on notificationsyou...

my m21 is up to date but still unable to use wifi calling, can you please help