what happens if you turn off mobile data
Turn off cellular data. You can temporarily turn off cellular data to prevent apps from using the cellular network to send or receive data. Here's what happens when you turn off cellular data: 1  You won't see the cellular data icons in the status bar (for example, LTE or 3G).2  You won't be able to send or receive MMS messages. 3  You can still send and receive SMS and iMessages (text or multimedia) when connected to a Wi-Fi network.ere's what happens when you turn off cellular data: 1  You won't see the cellular data icons in the status bar (for example, LTE or 3G). 2  You won't be able to send or receive MMS messages.