How much silver and gold is used in a phone

For once and for all: the amount of silver and gold in an iphone.

Gold: 30 mg
Silver: 90 mg
1.5 billion smartphones/year produced

This amounts to:

45 tonnes gold demand/year of total global 4000 tonnes gold demand/year
135 tonnes silver demand/year of total global 30000 tonnes silver demand/year

So smartphones only use 1% gold and 0.5% silver from total global demand. Negligible.