Mossberg's Mailbox Weighing the Kindle, iPad for E-Books Skype's computer-based group-calling feature worked much better, though my tests were more limited, and were conducted with a group of Skype employees who were using a wired office network connection. (I was on Wi-Fi at my home.) Group calling, which can handle between three and 10 people, is a feature of the latest Windows version of Skype,