(Source: @WP7Q1ng)
More images of the upcoming device trickle out of southeast Asia

New images have been leaked of Microsoft Corp.'s (MSFT) upcoming midrange Lumia 830 device.  The new smartphone is expected to be announced sometime in September, likely shipping late that month or in early October.

The new device is expected to have an aluminum frame, similar to the Samsung Electronics Comp., Ltd. (KRX:005930) (KRX:005935) Galaxy Alpha.  While it can't quite keep up with much higher priced premium devices such as the Galaxy Alpha, the Lumia 830 is nonetheless a major upgrade over its predecessor, the Lumia 820.

Aside from the rather radical body change away from a rounded-edges pure-plastic model, there's equally compelling upgrades to the hardware spec, from the previous generation model, the Lumia 820.  Where as the Lumia 820 had packed a 4.3-inch SVGA (800 x 480 pixel) display, its successor is expected to carry a 4.5-inch 720p (1,280 x 720 pixel) display.  The processor is also expected to receive an upgrade.

Lumia 830

The biggest improvement, though is the inclusion of a shiny new 20.1 megapixel sensor.  Thus far only a handful of more expensive devices have packed this kind of imaging power, including several models in Sony Corp.'s (TYO:6758) Xperia Z Series (the Z1 Compact, Z1S, Z2, and upcoming models), Samsung Galaxy K Zoom, a couple of Lumias (the Lumia 1520 and Lumia 930).

Given the 20.1 megapixel resolution (subtly different from Sony and Samsung's 20.7 megapixel sensors), it's highly likely this sensor is a Toshiba Corp. (TYO:6502) module.  Further, aside from the Lumia 920, which used a 8.7 megapixel Sony EXMOR sensor, virtually all high end Lumia devices analyzed were found to carry Toshiba sensors.

Lumia 830 back face

We the Lumia 830 to carry Toshiba's T4K46 chip, which was made public in March 2014 and was expected to enter mass production in Q3 2014.  The sensor packs 1.2 µm square pixels (in a 5,216 (H) × 3,920 pixel layout).  The sensor footprint is 1/2.3".  The sensor uses back-side illumination (BSI) which has been the case for every known Lumia sensor.  (BSI generally yields superior results to the front-side illumination (FSI) used in the non-Windows Phone Nokia PureView 808, as the illuminating layer doesn't block incoming light).

The sensor is expected to be paired with a ZEISS PureView optics module from Carl Zeiss.  As with past designs, this is expected to feature several plastic lenses (typically 5) and a single glass lens, which together carry out the optical image stabilization (OIS).

In testing by the PureView Club, Sony's 20.7 megapixel EXMOR sensor was compared extensively to the previous generation 20.1 megapixel Toshiba sensor.  The overall finding was that the Toshiba sensor produced a slightly underexposed image, while Sony's sensor tended to overexpose (wash out).  Generally, underexposure is more desirable as it can be more accurately post-processed to a neutral exposure.  The ZEISS optics package was also better at focusing during close-up photography.

The LED module appears to be a single LED flash, which isn't terribly surprising at this price level.

The phone features pretty standard side buttons -- a volume rocker, power button, and camera button

Lumia 830 buttons

The location of the headphone jack appears to have shifted from the right side of the top face (when looking at the device screen) to the center, an interesting design tweak. The microUSB jack has been shifted to where the headphone jack was previously.  This may be to better accomodate the phone when charging in your car, where users often rest their device in a cupholder.

Lumia 830 top

The images show that the device has physical buttons (although the virtual buttons are still showing up in the firmware).  The phone is expected to run Windows Phone 8.1 Update 1 and the new Debian Red firmware.

The photos in this piece were leaked from China by microblogger/leaker @WP7Q1ng (get it, Windows Phone 7 "king"?).  It's well known that China is where most high-end Lumia devices are painstakingly assembled. Not surprisingly, it's also the source of many of the leaks we received during the wind up to device launches.

The Lumia 730, 830, and possibly another device will likely be unveiled at the IFA 2014 (Sept. 5-10th) mobile electronics trade show in Berlin, Germany.

Sources: @WP7Q1ng, via WM Power User

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