Iam using galaxy M21.There is no vibration and notification sound while receiving message on WhatsApp. I had reinstalled my whatsapp and done every troubleshooting. Still facing the same issure. So I need a proper solution for the issue. Please give ...

Iam using Galaxy M21 series. I dont have an inbuilt option for locking my applications in my phone. So I whould like to get an option for locking my application. I need to lock my applicatuon instedlly whwn ever Iam minimising my apps and opening it....

All my resevied files are not showing in my gallery. Its also not showing in my file. It is only showing in android folder in my mobile. Iam using WhatsApp as my dual app. But in that also I cant sent stickera and I cant use WhatsApp camera for sendi...