The mobile industry’s biggest annual event is called off over fears of attendees spreading the infection. But Samsung, which held its own launch event this week, revealed a new attempt at a phone with a folding screen. Plus, we visit Startup Grind Global to discover the latest ideas looking for Silicon Valley investors’ money. Presented by Rory Cellan-Jones, with BBC tech reporter Chris Fox, and special guest Rachael Myrow, senior tech editor at Californian broadcaster KQED.