Death of Telephone, Part I: LinkedIn offers free voice calling to members

LinkedIn has announced free voice calling for its members. The business directory service has been adding new features recently, layering Facebook and Twitter style features on top of its basic resume and business contact services. In partnership with Plingm, a Swedish mobile VoIP provider (think Skype), any LinkedIn member will be able to initiate a voice call with any other LinkedIn member anywhere in the world. To take advantage of the service, you have to download the Plingm app for your smartphone.

This may or may not turn out to be especially useful, as mobile operators continue to try to discourage using the cellular data network to originate voice calls. If this became popular, who needs a phone number and the $25 to $40 per month cellular voice service? Instead, everyone would just want to drop the hugely profitable voice service and just pay for the cellular data service, which is causing the cellular providers nothing but headaches as they try to keep their networks upgraded to meet the ever-expanding demand.

Traditional phone service is dead, and the telephone companies are firmly determined to keep applying CPR to the rapidly decaying corpse as long as possible.