BARCELONA — Samsung’s Z1 smartphone is aimed squarely at developing countries and so comes with an extremely low price — about $90 (roughly £60 or AU$115).

In order to limbo under that very low bar, Samsung has ditched the Android software it usually uses on its smartphones, instead opting for Tizen, an operating system created by Samsung and various other companies — it also uses it on its new smart TVs.

Tizen is an open-source operating system and as such, has been taken and moulded by various manufacturers to fit a range of products. It’s not just for phones — Tizen can be found on watches (including Samsung’s own Gear S), cameras, car entertainment systems and connected home appliances.
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https://www.cnet.com/reviews/samsung-z1-preview/