If you’re living thousands of miles from home, how do you keep in touch, especially when your loved ones don’t have reliable internet?

There’s a growing market across Africa and beyond for apps helping to cut the costs of international calls to older phones. And some operators have much grander ambitions.

If you'd like to get in touch with the team, our email address is [email protected]

Presented and produced by Matthew Kenyon

Business Daily is the home of in-depth audio journalism devoted to the world of money and work. From small startup stories to big corporate takeovers, global economic shifts to trends in technology, we look at the key figures, ideas and events shaping business.

Each episode is a 17-minute, daily deep dive into a single topic, featuring expert analysis and the people at the heart of the story.

Recent episodes explore the weight-loss drug revolution, the growth in AI, the cost of living, why bond markets are so powerful, China's property bubble, and Gen Z's experience of the current job market.

We also feature in-depth interviews with company founders and some of the world's most prominent CEOs. These include Google's Sundar Pichai, Wikipedia founder Jimmy Wales, and the CEO of Canva, Melanie Perkins.

(Picture: Oluseyi Akinnibosun, Nigerian entrepreneur and app developer who's living in the Netherlands, about to make a call.)