It simply happens that things do not work as expected. What happens if you don’t ask for permissions? Every time that you see a popup asking if an application can access something, it is the Permissions engine at work. “Android permissions” are that mechanism that handles all the requesting and granting permission to use potentially dangerous features. Typical Android permission request popup (Image by Google) Also, access to the external storage is forbidden, …and so on. The same if it wants to access your camera because it could shoot photos of your personal life. For instance, if an application wants to read your geolocation data, it must explicitly ask you permissions, because it could use that data to stalk you. An application can’t do with the phone what it wants, but for those features that can harm the user in a way or in another, it must explicitly ask the user the permission to do that. Android is an operating system that is based on Unix and so cares a lot about the safety of its users. A quick recap for the few devs that have never had to deal with Android permissions.

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