CNET Quick Tips: Make VoIP calls on your iPhone Ye Olde Stuff / April 16th, 2008 A new app called Fring lets you make VoIP calls on your iPhone. It’s a little slicker, but similar to SIP- VoIP. You must jailbreak your phone to make this work. See more videos like this at CNET TV. Link to this video on CNET TV.