What did you do to your old phone when you upgraded to a new model? Too many of us are doing the wrong thing.

In this episode of Which? Shorts, we explain why buying a new piece of tech when the model you're upgrading from is still perfectly serviceable is doing more harm than good, especially when you don't dispose of them properly.

In a recent survey of Which? members, more than 50% of smartphones and tablets that had been replaced over the previous five years were still in working order. So, how often should you actually upgrade? And what should you do with the devices you no longer need?

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