As an investor, what we're not looking for is 'oh this is a cool app,' it's 'is this something that can become a big business?' You need to find those that can become real businesses.

The next Google or Facebook will come from somewhere other than Silicon Valley.

Angry Birds is one of the fastest-growing online products I've seen, growing even faster than Skype, and the company has done a brilliant job of extending it across different platforms and merchandise.

Surround yourself with smart, dedicated people - to build something isn't a one-man show. It's more important to have smart people who really believe in what you're doing than really experienced people who may not share your dream.

They also can combine voice with instant messaging and online file sharing.

The telephone is a 100-year-old technology. It's time for a change. Charging for phone calls is something you did last century.

We also have a conference call feature where up to five people can talk on one Skype call.