Celtel established a mobile phone network in Africa at a time when investors told me that there was no market for mobile phones there.
Mobile phones could not work in Africa without prepaid because it's a cash society.
In Africa it's difficult to carry the money, it's difficult to have a banking system with tellers, with distribution of cash. So they are using their mobile phones.
The institutions are working better now, the banks are much more functional. At this time, 1997, there were no mobile phones! It's a whole different thing now with mobile phones: technology has created a form of regulation, because people can actually talk to each other a lot more.
There was once this viral photo of the Pope doing his Pope-mobile parade, and everyone had their phones up. But there was this one old woman looking over the fence so beautifully at him. She was totally in the moment. For me, then, I think there shouldn't be any phones at a Pope-mobile situation - or at a Beyonce concert.
It used to be that we imagined that our mobile phones would be for us to talk to each other. Now, our mobile phones are there to talk to us.
The mobile business in particular is something we must take seriously. I see tremendous prospects for all those transactions that can be handled on mobile phones.
If you believe that the mobile phone is the next supercomputer, which I do, you can imagine a datacenter that is modeled after, literally, hundreds or thousands or millions of mobile phones. They won't have screens on them, but there'll be millions of lightweight mobile-phone processors in the datacenter.
Much as Africa has leapfrogged straight to mobile phones, it has the opportunity to skip the dirty, grid-tied power plants that currently operate across the developed world and go straight to clean, distributed power.
The biggest opportunity in 2013 is in Africa. It has seven out of the ten fastest-growing economies in the world. In Nigeria alone there are 100 million people with mobile phones. In total, 300 million Africans - five times the population of Britain - are in the middle class.
I was MCing in the playground, spitting lyrics over mobile phones - Sony Ericsson, Walkmans, W810s, the Teardrop Nokia phones, all of that. Vital equipment! I never even had a DJ set where a DJ's playing vinyl, and I'm spitting.
Many students don't really like it (fashion). If they don't like it, they won't be able to tell you who the stylists are or the photographers. If they say they can't remember the names but they recognize the work, I'll say that's bullshit because if you were selling mobile phones, you'd know all about the phones' features and tariffs.
We think of them as mobile phones, but the personal computer, mobile phone and the Internet are merging into some new medium like the personal computer in the 1980s or the Internet in the 1990s.
They're pretty accurate, the clocks in mobile phones.
The international limit on mobile texting, or SMS, is 160 characters. We wanted Twitter to be entirely readable and writable on every single one of the over five billion mobile phones on this planet, because they all have SMS built in. So we said it has to be within 160 characters, all the tweets.
Mobile phones amplify human talents for cooperation.