The Nokia Lumia 900 will be launching on April 8 in AT&T stores, priced at $99.99 with a two-year contract.  This will be AT&T’s cheapest flagship phone ever sold.

The Lumia 900 features a Gorilla Glass screen with a 4.3-inch AMOLED display, and unlike the Lumia 800 which lacks a front facing camera, the 900 is equipped with a 1MP front camera.  It’s 4G/LTE ready, and comes with either a blue or black polycarbonate case.  A white version will be available by April 22.

In the beginning…

Nokia launched their first two Lumia phones in October 2011: the Lumia 800 and the Lumia 710.  The The Lumia 800 features a Curved glass, 3.7″ touchscreen, a smooth, one-piece body Carl Zeiss optics, an 8 MP camera with HD video and 16 GB mass memory  with no slot for micro-SD cards. It runs Windows Phone 7.5 Mango, and is available in cyan, black and magenta.

The Lumia 710 features a ClearBlack display, an anti-glare screen, 3.7″ touchscreen, a 5 MP camera with auto-focus and an LED flash.  It runs Windows Phone 7.5 Mango , and is available in black and white with black, white, cyan, fuchsia and yellow back covers.

And at Mobile World Congress this year, Nokia unveiled the Lumia 610 with the Nokia 808 PureView, their smartphone with the whopping 41 megapixel camera.

The Lumia 610 features 3.7” LCD display, WVGA 800 x 480 pixels, Capacitive touchscreen with pinch zoom,  8 GB  no microSD slot, Windows Phone 7.5 Mango, and is available in cyan, white, black, and magenta.

The Lumia line comes with four Nokia-exclusive applications, not included with the default Windows Phone OS. Nokia Drive, a free turn-by-turn navigation system; Nokia Maps; Nokia Music, a free streaming music service similar to and music store; and App Highlights, a service suggesting software based on location and operator.

The Lumia Performance

A report from CNET states that Nokia’s Windows-based phones are now outselling Nokia Symbian-based phones.

In the last three months, 2.5% of people in the UK said they purchased a Lumia phone, while 2.4% bought devices using the company’s older Symbian operating system.  The Lumia 800 accounted for 87% of Nokia’s Windows Phone sales.

Reported Problems

Lumia 800

• On-screen keyboard disappears while typing.
• “Sound quality problems” when using low impedance headphones like the supplied ones.
• Poor battery life.
• Problem with camera focus in certain conditions.
• Screen flickering.

Lumia 710

• Disconnecting calls.
• Issues with short battery life

Bug Fix

Some of the issues in the Lumia 800 were addressed in their latest update.  The fix includes:

• Enhanced battery standby and talk time performance
• Battery capacity icon instead of question mark on top right of screen
• Improved bass in audio performance
• Soft-key illumination at all brightness levels
• Fixes for device performance issues including self-reboots, freezes and call-ending.