Microsoft has introduced 3 new phones into the Lumia Group – the Lumia 830, 730 Dual SIM and the 735.
Lumia 830
The 830 is the thinnest (8.5mm) and lightest (150g) Lumia yet
The Lumia 830 packs in all the flagship innovations like PureView, integrated wireless charging and SensorCore, in an ultra-sleek design and price.
The Lumia 830 boasts serious photographic prowess; a 10-megapixel PureView camera with ZEISS optics, Rich Recording, and the thinnest Optical Image Stabilization system weve ever crammed into a Lumia smartphone.

Taking images and editing your shots will also get a boost with the over-the-air update of Lumia Camera that introduces a quicker camera start-up time and shooting speeds, and adds new features such as Rich Capture and Moment Capture, which make it quicker and easier to snap, edit and share your life with amazing quality pictures.
This premium polycarbonate and metal Lumia has a five-inch ClearBlack display with Curved Gorilla 3.0 glass, and runs a 1.2GHz quad-core Qualcomm Snapdragon 400 processor with 16GB of memory, which is expandable by 128GB via microSD.
https://www.youtube.com/watch?v=-sKyZZF6YjE
Lumia 730 Dual SIM and Lumia 735: Selfie and Skype masters
For those who love to connect and share with their front facing camera (selfies are a way of life, and Skype is the only way to call), meet the socially connected Lumia 730 Dual SIM and Lumia 735.
These quad-core smartphones boast a stunning sleek design and are also imaging masters. The 5MP front-facing camera boasts a focal length of 24mm that, put simply, means its wide-angle lens will capture more in the frame more people, more background, more fun whether thats on the town with friends or making Skype calls with family.
You can make unique creations with the new Lumia Selfie app, which comes pre-loaded. Selected markets will also be able to take advantage of a free three-month Skype Unlimited World subscription.
Whats more, Lumia 730 Dual SIM and Lumia 735 come with two microphones and clever Lumia voice processing to capture clear audio, doing away with unwanted background noise.
Everything is powered by a 1.2 GHz Snapdragon quad-core processor and its 4.7-inch OLED display has an-almost 180-degree viewing angle that works great in bright sunlight.
Theres 15GB of free OneDrive storage to supplement the 8GB of on-board memory, which can be bolstered with a 128GB microSD card.
A 6.7-megapixel camera can be found on the back and you have the choice of 4G/LTE (Lumia 735) or 3G Dual SIM (Lumia 730).
https://www.youtube.com/watch?v=rmkNiLRFZKI
And, of course, you get the best of Microsoft with pre-loaded Microsoft Office, Windows Phone 8.1 with Lumia Denim and15GB of OneDrive storage.
The Lumia Denim
Shipping with Lumia 830, Lumia 730 Dual SIM and Lumia 735, and rolling out as an over-the-air update to all Lumia Windows Phone 8 smartphones this year, the Lumia Denim update combines exclusive Lumia experiences with new features from the latest Windows Phone 8.1 update 1.
As part of the Windows Phone 8.1 Update 1, Lumia owners will be able to enjoy Live Folders organization, Apps Corner customization, SMS merge and forwarding, and the ability to customize the snooze time within the Alarm app.
The new Hey Cortana feature available will also come to the Lumia 1520, Lumia 930 and Lumia Icon, allowing you hands-free access to Cortana, waking up your most helpful digital assistant with just the sound of your voice calling out Hey Cortana.
Lumia-specific improvements include the feature-packed Lumia Camera update (available on selected Lumia devices in Q4 2014), which brings a super-fast start-up and capture-to-capture speeds, Moment Capture for recording 4k video at 24fps and 8.3 megapixels per frame (which are such quality, you can save each frame as a high quality still picture), Rich Capture, which simplifies picture-taking with auto HDR and Dynamic Flash, and improved quality in the day and at night.
Glance screen also gets a boost, now allowing you to personalize like never before; compatible Lumias will be able to show things like Bing Weather or Bing Health & Fitness data.