Mobile Data (iPhone unless iPad with SIM): Turn ON to allow data from the mobile network for email, web browsing (apps) and push notifications. Turn OFF Data Roaming (in Mobile Data Options) if in a foreign country where there is a charge you don’t want to pay for mobile data. Rely on WiFi only. Tip. A push notification is an alert (typically a pop-up or other message) generated by an application when the application is not open, notifying the user of a new message, update, social media post, etc.
