What happens to the old mobile phones?
It depends on the state and demand of the phone. If the phone is completely broken, with no chance of salvaging it for normal every day use, it is sent to a specialist recycling company who will reclaim whatever chemicals and materials they can from the phone. This will then be reused in other products. If the mobile phone is of usable quality, the phones are spruced up as best as possible and shipped off to developing countries for re-use.