Email Samsung and Apple
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Millions of us love and rely on smartphones.
But Samsung and Apple almost certainly use tin in their mobiles that's come from Bangka Island - where tin mining is ravaging forests and coral reefs, injuring miners and destroying fishermen's livelihoods.
They may not have known this until we told them. We've asked them to reveal where they get their tin from but so far they haven't given us a clear answer.
Thousands of messages from potential and current customers can help change that.
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