Add great value to an apartment you are renting out by adding Phonebnb. By offering unlimited local and international calls anywhere and to anywhere you would be appealing to business travelers and leisure travelers alike. You can simply add the cost of the service to your daily rate and make your apartment more desirable!
Travelers will certainly prefer an apartment which is already equipped with a landline. This means that your guests will not be subjected to bad cell reception or to battery life of their device in order to stay connected.
Even with a laptop or tablet, the comfort of making calls from a regular phone versus a computer is certainly worthwhile, not to mention the ability to call any cell number and not just whoever is connected.