Why whatsapp calls on Samsung S9+ phone goes on mute automatically when screen is locked.

[Android Central Question]

Whenever my phone is locked and a WhatsApp call is on my phone automatically goes on mute. I tried the suggestion given in this forum and found whatsapp not being a part of sleeping app.

 

[B. Diddy]

Welcome to Android Central! Try also going to the Battery Optimization option in the system settings and change it to Unrestricted.

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[mustang7757]

Agree with B. Diddy
Samsung phones are aggressive putting apps to sleep so long press Whatsapp>tap info>battery>unrestricted usually its on optimize

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