Xperia Z1S is Sony's flagship in the US, coming to T-Mobile this month

Sony is once again trying to bolster its line-up in the US. A year after the introduction of the Xperia Z, the company has announced another waterproof phone for the States - the Xperia Z1S. Essentially, it's the US version of the Xperia Z1 with a few minor differences.

The new flagship heading stateside features a 5-inch 1080p display, Snapdragon 800 processor running at 2.2GHz, 2GB of RAM, 16GB of internal storage, 3000mAh battery, and is waterproof down to 4.9 feet for 30 minutes.

Sony has placed Android 4.3 Jelly Bean on the Xperia Z1S as its software, but has thrown its custom interface on top.

T-Mobile will begin offering the Xperia Z1S on its online store on 13 January, and it will be available in-store on 22 January. The Xperia Z1S will be available for $600 (£366) or $22 a month for 24 months.