Email Notifications On Android 4.4.2

[Android Question]

Hi,

I have a new LG G3 running 4.4.2 on O2

I have it configured for my works exchange account with push set.

When my phone is awake i get notifications instantly.

But when my phone sleeps the notifications take a lot longer and sometimes do not happen at all and it is only when I unlock the phone that I get the notifications.

Any help or advice would be great.

Many thanks

 

[Mr. Lucky]

You probably have wi-fi set to go off when the screen is off.
Goto: Settings > Wi-Fi, then press overflow (3 vertical dots) icon > Advanced
Ensure "Keep Wi-Fi on during sleep" is set to "Always."