I'm having a phone interview in a little bit and I'm unsure:

Does the company call me in a Skype interview or should I call them? Is there a convention in that sense?

Unfortunately, no agreement was made, and it was more like "We'll speak then". (It's for an internship and a relatively relaxed matter). Since Skype is free either way, it is more like a matter of 'Do I seem uninterested if I don't call them'?