This is an app you can open by tapping the gray cog icon on your home screen. You may find it in the Utilities folder.;
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This option is called Mobile Data on phones that use British English.
 The apps are listed in alphabetical order, so you may need to scroll down 1 or 2 screens to find Instagram.


While data is disabled, you’ll only be able to use Instagram while connected to Wi-Fi.You can re-enable data at any time by sliding this switch back on.
Open your iPhone’s settings.
Tap Cellular.
Scroll down and slide the Instagram switch to the off position.
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