What Is Cellular Data on the IPhone?

Cellular data is covered under a separate plan with your wireless carrier, generally referred to as a "data plan". The data used when not connected to a Wi-Fi network is deducted from the plan's set amount. Instant messaging, music and movie streaming, as well as social media applications often use up a lot of cellular data. Turning off push notifications for messaging and email will help to conserve data when approaching the monthly limit.