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How is a smartphone made?

Every year, more than a billion smartphones are sold around the world. But how is a phone made?

First, raw materials such as lithium, cobalt and gold are extracted from mines in different countries. These minerals are then shipped to factories, where they are processed and turned into batteries, chips and screens. The parts are assembled by workers and robots, and each phone is tested before it is packed.

Unfortunately, only a small part of old phones is recycled. Most of them are kept in drawers or thrown away. Experts say that many valuable metals could be recovered if electronic waste were collected properly.