Current typical smart phone lifetime is 3 years.
To compensate for the greenhouse gas emissions from production, distribution and disposal, they should last from 25 to 232 (!) years.
Coolproducts don't cost the Earth - Report - EEB - The European Environmental Bureau
Our electricals don’t last as long as they used to. Their useful lifespans are decreasing and it is becoming increasingly difficult and expensive to repair them or replace key parts like a cracked screen. Whatever the reason, repeatedly manufacturing new products to replace old ones is not just bad news for consu ...
(eeb.org)