1.) Download or install the Android-SDK (http://developer.android.com/sdk/index.html#Other). If you're using Ubuntu you can also run "sudo apt-get install android-tools-adb".
 
1.) Download or install the Android-SDK (http://developer.android.com/sdk/index.html#Other). If you're using Ubuntu you can also run "sudo apt-get install android-tools-adb".
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2.) Connect your smartphone via USB to your machine
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2.) Enable the "developer mode" on your device. Take a look at the following guide for the instructions: http://web.archive.org/web/20160114105932/http://www.greenbot.com/article/2457986/how-to-enable-developer-options-on-your-android-phone-or-tablet.html