Samsung has today announced that it has shipped 10 million Galaxy S4 smartphones globally, less than a month after the device officially went on sale in Australia.

Samsung has already shipped 10 million units of the Galaxy S4 smartphone.

The milestone references "global channel sales" of the Galaxy S4 rather than how many devices are actually in the hands of end users but it's still a hugely impressive figure.

According to Samsung, the Galaxy S4 is estimated to be selling at "a rate of four units per second."

The Galaxy S4 reaching the 10 million shipment mark in less than a month is a new record for Samsung and makes it the company's fastest selling smartphone of all time.

By contrast, the Galaxy S III took 50 days after its launch to ship the same amount of units, while the S II took five months and the original Galaxy S took almost seven months.

Samsung's CEO and President of the IT & Mobile Communications Division, JK Shin, released a statement marking the Galaxy S4 milestone.

In addition to announcing the milestone, Samsung says it also plans to release more color variants of the Galaxy S4. Among the new colours set to launch in the coming months include "Blue Arctic", "Red Aurora", "Purple Mirage" and "Brown Autumn".

The Galaxy S4 is currently sold in "White Mist" and "Black Forest" colours.

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