What happens when you turn off cellular data on iphone

After turning off mobile data, you'll still be able to make and receive phone calls and get text messages. But you won't be able to access the internet until you reconnect to a Wi-Fi network.

It's the fast data connection available, unless you're using Wi-Fi. When Cellular Data is off, you'll only see the signal strength bars in the upper left-hand corner of your iPhone. For almost everyone, it's a good idea to leave Cellular Data on.

However, if the person used regular SMS to text you, you should be able to receive it even if you are not connected to the internet.

If you're wanting to stay off the grid, you should turn your data off. By having it switched on, your mobile service provider could (theoretically) track your phone's location. You may have previously given apps permission to use your location data too, meaning that you're unwittingly sharing your private information.