AT&T and Apple Allow Cheap VoIP Calls on 3G
In all of the hullabaloo over it the iPad, a long-awaited change to the iPhone got lost in the shuffle: Apple has taken the wraps off VoIP calls over the 3G network. That could mean a potentially huge savings on domestic and foreign calls.
The reason is VoIP calls use data minutes rather than voice minutes. That means that you could buy a plan with minimal number of minutes — fewer than you actually use — as long as you have an unlimited data plan. Then you could make as many calls as you want over data.
The first VoIP product up and running on the iPhone is iCall, a free app that gives you three ways to pay for calls. You can sign up for free calls to the United States and Canada that require you to listen to an ad before your call is made. Calls are limited to five minutes.