ASUS has unveiled a new lineup of “ZenFone” smartphones. Available in four, five, and six-inch form factors, the smartphones run Google's Android operating system and are powered by Intel's Clover Trail+ Atom processors. The ZenFone lineup features colorful chassis options, large batteries, IPS touchscreen displays in various screen sizes, front and rear cameras with PixelMaster technology, and Android 4.3 (will receive 4.4) with ASUS' own customized user interface.

Specifically, ASUS is launching the ZenFone 4, ZenFone 5, and ZenFone 6 in four, five, and six-inch physical form factors.

The ZenFone 4 has a 4-inch 800×480 TFT touchscreen display, a VGA webcam, and a 5-megapixel rear camera. ASUS is offering the ZenFone 4 in five colors including Charcoal Black, Pearl White, Cherry Red, Sky Blue, and Solar Yellow. Note that the Solar Yellow and Sky Blue colors are exclusive to the smallest ZenFone.

Internally, the 4-inch ZenFone 4 is powered by a dual core (four threads with HyperThreading) Intel Atom Z2520 processor clocked at 1.2 GHz, 1GB RAM, up to 64GB of storage via microSD card, and a 1,170 mAh battery.

From there, the ZenFone 5 steps up the hardware specifications to a larger 5-inch IPS HD (1280×720) touchscreen, better front and rear cameras, and faster internal hardware. The ZenFone 5 comes with a 2MP front camera and a 8MP PixelMaster rear camera with image stabilization, a BSI (Backside Illumination) sensor, and a wide aperture F/2.0 lens. The touchscreen has PenTouch and GloveTouch technology, allowing users to use the touchscreen with a stylus or gloved hands. The phone comes in Charcoal Black, Pearl White, Cherry Red, and Campagne Gold.

Internally, the ZenFone 5 has a Intel Atom Z2580 clocked at 2 GHz (2 core, four thread), 1GB of RAM, up to 64GB of storage via microSD card, and a 2,050 mAh battery.

Finally, the ZenFone 6 is the flagship device of the lineup. It is also the largest of the bunch, with a 6-inch 720p IPS display. It offers up a 2MP webcam, 13MP PixelMaster rear camera, and SonicMaster audio (which provides virtual surround sound over headphones). The phone is available in the same black, white, red, and gold colors as the ZenFone 5. It shares the same processor, memory, and storage of the ZenFone 5, but adds a beefier 3,230 mAh battery.

The full table of specifications is available below for further information.

  ZenFone 4 ZenFone 5 ZenFone 6
Display 4” WVGA 800 x 480-pixel TFT display
 
5” HD 1280 x 720-pixel IPS display
 
6" HD 1280 x 720-pixel IPS display
 
SoC Intel Atom Z2520 @ 1.2 GHz Intel Atom Z2580 @ 2.0 GHz Intel Atom Z2580 @ 2.0 GHz
RAM 1GB RAM 1GB RAM 1GB RAM
Storage Up to 64GB micro SD card Up to 64GB micro SD card Up to 64GB micro SD card
Radios GSM/GPRS/EDGE; WCDMA/HSPA+
DC-HSPA+ (DL/UL): 42/5.76 Mbps
Integrated 802.11b/g/n; Wi-Fi Direct
GSM/GPRS/EDGE; WCDMA/HSPA+
DC-HSPA+ (DL/UL): 42/5.76 Mbps
Integrated 802.11b/g/n; Wi-Fi Direct
GSM/GPRS/EDGE; WCDMA/HSPA+
DC-HSPA+ (DL/UL): 42/5.76 Mbps
Integrated 802.11b/g/n; Wi-Fi Direct
Battery 1170mAh 2050mAh 3230mAh
Cameras 5-megapixel rear camera
0.3-megapixel front camera
8-megapixel rear camera
2-megapixel front camera
13-megapixel rear camera
2-megapixel front camera
OS Android 4.3 (will update to Android 4.4 KitKat) Android 4.3 (will update to Android 4.4 KitKat) Android 4.3 (will update to Android 4.4 KitKat)
Dimensions 124.4 x 61.4 x 11.2-6.3mm 148.2 x 72.8 x 10.3-5.5mm 166.9 x 84.3 x 9.9-5.5mm
Weight 115g 144g 200g

Each of the phones comes with Android 4.3 and a custom ZenUI interface from ASUS. ZenUI provides visual tweaks as well as applications, including the Omlet Chat messaging application and a email app that supports threading messages. On the ZenFone 6, users can employ "Reader Mode" to reduce eye streain when purusing long documents or books.

In all, ASUS has an interesting lineup with its new ZenFone smartphones. In particular, the ASUS ZenFone 6 is neat looking phone (especially in red) with some powerful hardware. The bad news? Pricing and availability are still unknown, and as an Intel-powered smartphone it is highly unlikely to ever be offered in the US (just my luck).

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