Samsung Electronics said Monday it has sold 1 million units of its Tizen-powered smartphones, as part of the company's campaign to promote its non-Android operating system. Samsung released the Z1 in India - the world's third-biggest smartphone market - Bangladesh and Sri Lanka, and claims that sales have reached the 1 million units as of Wednesday.

Tizen is an open-source operating system for smart devices being promoted by Samsung, Intel, Huawei and other global tech players. Samsung has been playing a leading role in its development, applying it in some of its wearable devices such as Gear smartwatches.

The 4-inch Samsung Z1 is powered by the Tizen 2.3 platform and comes with a 1.2GHz dual-core processor. Weighing only 112 grams, it is equipped with a 3.1-megapixel rear camera and a 1,500 mAh battery.

The Z1 costs in India just 5,700 Indian rupees ($89.14).

Samsung is said to plan to roll out an improved model of the Z1 within this year as well as other models available in a wide range of prices.