Football is a family of team sports that involve, to varying degrees, kicking a ball to score a goal. Unqualified, the word football is understood to refer to whichever form of football is the most popular in the regional context in which the word appears. Sports commonly called football in certain places include association football (known as soccer in some countries); gridiron football (specifically American football or Canadian football); Australian rules football; rugby football (either rugby league or rugby union); and Gaelic football. These different variations of football are known as football codes.
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To install apps that are not from the Google Play Store; Android requires you to enable the (Unknown Sources Setting).
To enable the Unknown Sources setting:
Go to your Home screen and tap Settings. Select Security. You may need to scroll down to see the Unknown Sources setting, enable this setting then try installing the application again. For Android 8.0+, tap Settings, then tap Apps. Next search for the app you just downloaded and enable it to be installed. If you still have problems try searching online for how to turn on >>> (Enable Unknown Sources) for Android.