I have three Android devices:

  • Lenovo A7000 with Stock ROM Lollipop 5.0
  • HTC Desire 620G with Stock ROM KitKat 4.4
  • Samsung Galaxy Tab 2 with custom ROM (Resurrection ROM) Lollipop 5.0.2.

In all these devices, WhatsApp sleeps frequently when the screen is off. When I turn on the device screen and use WhatsApp, I am getting messages normally. But when the screen is off after a short span of time, it stops receiving messages. I need to turn on the screen and open WhatsApp to start getting the messages. Then a bunch of messages will be received.

I am facing this problem in all three devices in both Wi-Fi and mobile networks. My Wi-Fi network is fast enough (40 Mbps) to receive messages at an instant and mobile networks are decently fast (>3 Mbps).

In WhatsApp Web, I am getting Phone Not Connected yellow messages when I turn the screen off. After researching on the Internet, I learnt this may happen when the device enters power-saving mode or when background data is restricted. But in my devices, I never turn on power-saving mode and never restrict background data too.

Any other reasons? For this reason, I have changed the screen timeout to 30 minutes and left the WhatsApp open. Is this an app bug or some other problem?


It's common. I've tried all sorts and still don't receive messages until I manually turn the screen on.

The only thing I can think of is using Wake Lock - PowerManager. May use a little battery but will fix your problem


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