Mobile phones are sent to recycling centres and then they will be recycled and disposed in an eco friendly way.
The materials are extracted from those mobile phones are used by a number of different industries such as jewellery, electronics, furniture fittings automotive, art foundries, musical parts and media players etc.
Once you send your old mobile phones to one of the mobile phone recycling companies, first they check its condition.
They send old mobile phones to developing countries, which are in working condition where they are reused.
And rest of mobile phones, which are not in working condition, or broken beyond repair their useful components will be extracted and dispose in an eco-friendly way.