How to make Skype free international calls via Tropo

I've been used tropo free account as a developer for quite a time, as a developer, I can make unlimited free call to USA/CA. 

You know, there are some USA access numbers that can make free international calls, such as www.freecallpin.com, and www.freephone2phone.com and some good free call trials voip company which offered USA access numbers such as localphone, rebtel, vopium and operatorone etc.  Read more below: 

5 minutes free trials call by Voipum

here are so many free 5minutes international call trials, Vopium is one of them, many people don't care this free 5minutes, however, it will help a lot before you choose or top-up for one. Yet free minutes call trials sometimes is better than the one(s) who offers free $1 or more because free $ have limited minutes due to different destinations, and if you call the destinations very expensive per minutes with it normal rate USD0.45/min, then free 5 or 10 minutes is far more better.

A tip for you is that if you know how to use tropo, you will find the 5minutes free international trial calls is very helpful for you. You can use it to call from you skype to make free international calls. Read more...