Samsung CEO JK Shin expects the Samsung Galaxy S4 to surpass 10 million sales next week, less than a month after its debut. The milestone will make the new device the fastest-selling Samsung smartphone to date, a title that’s currently held by its predecessor, the Galaxy S III.

We always had a feeling that the Galaxy S4 was going to sell incredibly well, with Samsung’s Galaxy devices continuing to dominate the smartphone market. And that was confirmed earlier this week when an unnamed Samsung executive told Korea’s ChosunIlbo that 4 million units had been shipped in just four days.

Now the company’s co-CEO, JK Shin, has revealed that the Galaxy S4 is expected to surpass the 10 million sales milestone as early as next week.

“We are confident that we will pass more than 10 million sales of the S4 next week,” Shin told The Korea Times.

“It is selling much faster than the previous model S3. Samsung spent 50 days to pass the 10 million sales mark for the S3. The S4 will be Samsung’s first ’10 million seller’ device less than a month after its official debut.”

Samsung attributes the handset’s success on its massive marketing push, which sees promotional campaigns for the Galaxy S4 on television, on billboards, in newspapers and magazines, and just about everywhere else you look.

The Galaxy S4 is also set to receive a boost in popularity when the “Nexus edition” goes on sale through Google Play on June 26, priced at $649.

The device combines the Galaxy S4’s cutting-edge hardware with a stock Android experience — free from TouchWiz — and just like regular Nexus devices, it’ll receive the latest Android releases as soon as they’re available.