Notifications only arrive when connected to wifi

Hi just in case this has been missed if you go into apps in settings me use click on the apps you wish to use woth your mobile outside your home not on WiFi and make sure the permissions are set to the correct. 

Also make sure data only usage is set up on your phone for each app you want to use in the background but beware this can use a lot of your data up with apps that are using your mobile data without reliance upon WiFi so for instance you want your security camera running on mobile data so your ring app has to be turned on to use mobile date in the background and say you use amazon or ebay but not while your outside much turn them off using your mobile data as background processing and apps even android or apple apps that are configured for the phone they will use data without you releasing. 

I always go to my apps and turn of apps I dont use even games run background usage of mobile data in background, and if your not on a unlimited plan for data then you will will be out of data quicker than the ride home from the shops.

You can always go into setting and set up DATA WARNING so say you had 8gb of data you type 8gb date of the month you brought it or it came in to action on your device and it will remind you when your 80% out of data.

Also even on unlimited data networks don't tell you that if you are abusing data and even some if your not will slow you down once you reach 100 gb no network will give you the speeds of your data once you reach a data level as in all it cost them money and they are a business

Hope that helps 

Simon