Samsung and Greenpeace: what you need to know about e-waste

Greenpeace claims Samsung has 4.3m smartphones to dispose of after its Galaxy Note 7 recall. What's the responsible way to recycle them?

At the smartphone world's annual shindig in Barcelona, there are some things the tech giants have been trying to get people talking about - the relaunch of the Nokia 3310, BlackBerry's new fingerprint scanner, Samsung's virtual reality headset.

But there's another, less glamorous story that they haven't been so keen to promote. And that concerns the fate of their gadgets when consumers have finished with them.