Background mobile data enable/disable
For some reason my phone will not allow applications to use mobile data in the background. What this means is that WhapsApp/Signal will not notify me of new messages. I have to expressly open the app to check for new messages all the time. I know this is an issue with background mobile data because if I simply connect to a WIFI access point the apps will immediately notify me of pending messages. So the apps must have been running in the background!
The "Mobile data & Wi-Fi" settings for both apps have all settings enabled ("Background data", "Unrestricted data usage", "Enable Wi-Fi connection" and "Enable mobile connection"). I have also tried setting "Battery"->"System modes" to "High performance" and disabling "battery"->"Background app management"
Does anyone know how to configure the phone such that it will allow background apps to use mobile data.