Samsung Galaxy S3: How to Set or Clear Mark as Default on the Certain Contacts

One of the insiders named Sara was asked me how to assign non-default numbers to the speed dialing on her Samsung Galaxy SIII. First of all, you might be wondering why the numbers need to set as default? Well, it'll be useful if you have several phone numbers in a single contact and you want to send a message using easy text features, then the messaging app will automatically use the default