The 6-inch Acer Liquid S2 can record 4K-resolution video.

When it comes to HD, 4K is all the rage. Whether it's a 20-inch tablet, TVs or a gyro-stabilized cinema system, companies are finding ways to raise the bar on high-definition imaging and video. 

Now, Acer is upping its game with a 6-inch smartphone that can record 4K video. The Liquid S2 has a ring flash around its 13-megapixel, f2.2 camera and has room for a 128GB memory card — very handy if you are recording a lot of 4K-resolution video. 

From Acer:

This high-performance and ultra-multimedia smartphone is Acer’s first smartphone with 4K Ultra HD recording capability. Built with a 6-inch full HD screen with IPS technology, extremely fast connectivity including 4G LTE and the new Wi-Fi 802.11 ac standard, it is also the world’s first smartphone with dual speakers powered by Dolby® Digital Plus™ for a stunning sound experience.

[...]The Liquid S2 comes loaded with several camera enhancements including BSI Sensors and LED Ring Flash for sharper pictures, even in low light environments; “Favorite” Mode which lets users create up to five profiles with customized effects, flash, capture modes and scenes; and Exposure Control with one finger focus and exposure adjustment for clear and bright shots. 

Running Android 4.2.2, Acer's Liquid S2 smartphone is expected to be commercially available in late October. It will come in black or red, and pricing and distribution information has yet to be announced.