I got a new phone yesterday, Xiaomi Mi A1, and installed Whatsapp on it. Now I only get notifications when the app is open and a few minutes after I turn off the display (or go do some other thing). On my Whatsapp Web it says that the phone isn't connected, and I have to manually reopen the app in order to get any recent messages.

I figured it's some sort of restriction the Android places on background processes, but how do I remove it? I'm pretty sure I haven't messed with any sophisticated settings up until now

  • Please check this. Settings->Apps&Notifications->tap on WhatsApp. tap Data Usage, then enable Background data, if it is not enabled. Hope this solves the issue.
    – Rahul Gopi
    Jul 19 '18 at 12:11
  • It's enabled already. "Unrestricted data usage" is disabled, but it should take effect only on battery saving mode, which is off
    – Oded Sayar
    Jul 19 '18 at 13:35

I strongly suspect this is caused by the enhanced App battery saver, which restricts application activities to a minimum or altogether close an application to save power.

In some miui based Xiaomi phones it can be adjusted here: Security → Battery Usage → App battery saver → (Choose application) → Background settings:

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Alternatively on non miui Xiaomi devices it can adjusted under App settings → Battery usage:

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You have to turn off this setting or adjust to make sure the target application (Whatsapp) isn't killed in background.

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