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I have a Huawei P20 Lite with Android 9, EMUI 9.1.0 and WhatsApp 2.19.253, which is the latest version.

As I wrote in the title, I can't receive WhatsApp messages, after many hours of researching I didn't find any solution for my problem. This is the first time I face whit this problem, because I managed and configured variues P20 Lite but none of them gave me that headache.

The things which I did:

  • Turn on every single option for WhatsApp's notifications;
  • Uninstall the application and install it again;
  • Remove the app from the battery optimization process;
  • Clear the cache;
  • Enabled automatic start, secondary start and running in background, following this steps Settings -> Battery -> app launch -> 3 vertical dots -> manage manually;
  • No limit for internet traffic and allow background data, following Settings -> networks and wireless -> data usage -> select WhatsApp -> enabled the varius option.

Any idea or solution for this problem?

EDIT

When I send a message from my phone to this P20 Lite, on the message appears only 1 tick, such as the P20 is disconnected from wifi/mobile data, but the wifi is enabled and connected, the same behaviour with mobile data.

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    Have you disabled background data for Google Play Services? This service is used for notifying Whatsapp of new messages. See this question and it's answers for details: android.stackexchange.com/questions/216714 – Robert Sep 12 '19 at 18:53
  • @Robert No, the only things which I did, are wrote in the answer – Leonardo Bassi Sep 13 '19 at 8:37
  • Does your phone never receives messages when the screen is off or is there just a long delay. Let someone send you a message and leave the phone alone for may be 30 minutes. – Robert Sep 13 '19 at 9:29
  • @Robert Yes, the phone receives messages when the screen is lock, but after 5-10 minutes WhatsApp stop doing is background work such as the system kill the process. When I open it everything works well, instant messages with screen on and off – Leonardo Bassi Sep 13 '19 at 9:42
  • The OP in this thread also had the same issue as you and it was solved by going to «Setting--> battery optemization --> select "all apps" on the little arrow and go to Whatsapp and select " Not allowed"». There is another solution also on that thread. I know you wrote about battery optimization but try once more, you never know. – Reddy Lutonadio Sep 13 '19 at 16:08

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