Phone on standby mode: How do I get WhatsApp notifications?

[WPCentral Question]

when my phone is phone stand by mode...i dt get notification of message on watss app,

 

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Re: phone is on stand by mode.i dt get notification of watss app,as i double whats app mesage follo

Is your phone in battery save mode? You can recognize this by the little shield symbol on your battery indicator icon.
If so, turn off battery save mode or allow Whatsapp to run in the background while in battery save mode.