Microsoft's Mobile Meltdown

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Rory Cellan-Jones asks whether Microsoft's efforts to gain a foothold in the mobile market are finally over after it announced big cuts to its handsets business. He also visits a digital currency conference in London to find out where the future of Bitcoin lies, and special guest David Birch, digital currency expert, give his views. Plus we hear from Brazil on how technology could boost the barter economy, and children in the UK learning to code. (Picture: This week's Tech Tent; Credit: Rory Cellan-Jones, BBC)