How to Change the ringtone on your Android phone

Looking for a guide on how to set a custom default ringtone on your Android smartphone? One of the salient advantages of a Google Android smartphone over, say, an Apple iPhone, is the inherent extendibility of the open-source Android mobile OS. There are a seemingly infinite number of settings to tweak and advanced features to discover and use. This free video tutorial, in particular, discusses how to tell your Android mobile phone to use a specified audio file as its default ringtone.