AT&T Calypso User Manual page 33

Disable an app
You can disable some default apps which can't be uninstalled to avoid them
running in the background and downloading data .
1 . From the Home screen, swipe up to access Apps, and tap Settings
.
2 . Tap Apps & notifications > SEE ALL APPS .
3 . Tap the app you want to disable to access App info screen .
4 . Tap DISABLE .
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