So I just got the S21U today, and everything is wonderful so far, but could not figure out how to make sure whatsapp stays running in the background....
Background usage limits = put unused apps to sleep is OFF
sleeping apps/deep sleeping apps/ never sleeping apps is 0
I went into Optimise Battery Usage, and made sure NONE of the apps or services are enabled (so no optimization for anything!!!)
I even tried, enabling Battery optimization, and then adding whatsapp to NEVER sleeping apps. (did not change the behaviour)
"Allow background activity is selected" .. (I tried turning on and off Put unused apps to sleep) IT is now off, as it made no difference.
On all my other phones this seems to be working, never even had to do any of these settings.
The only thing that makes sense is Power Saving MODE OFF! but the description udner it...
Learning usage patterns...
Background network usage, syncing, and location checking will be limited and motion smoothness will be changed to standard.
I work all day and I need to be online on WhatsApp, what am I going to do, set the screen to never turn off so that the device is awake 24/7?
Yes Vodafone in the UK supports WiFi calling, and in my office I don't get good signal that is why I use WiFi calling.
I will disable it and try but logically WiFi calling shouldn't interfere with this.
That feature is, if you turn flight mode on or you don't have mobile signal you can still make calls by using your WiFi.
It has nothing to do with WhatsApp
Same issue. Both on Whatsapp and Whatsapp business.
Same issue, need severe help.
you can fix this issue by turning off adaptive battery on the setting
No, that doesn't work. Mine is off already.