The chemicals used in the plastic casings and the internal components of phones are very closely regulated to make sure they are not harmful people. There is European law called RoHS (Reduction of Hazardous Substances) that limit really dangerous chemicals like mercury. Having said that, if you ground up your phone into dust and then swallowed it, it would probably not be very good for you. Just using your phone normally will cause no harm 🙂
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Melon commented on :
okay i will make sure not to eat my phone