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Microsoft lifted the lid on two new wallet-friendly handsets at Mobile World Congress (MWC) 2015, as it continues to target cost-conscious consumers to boost take up for its Windows Phone platform.

The Lumia 640 is priced £100 and features a 5-inch screen, support for 3G and LTE networks, an eight-megapixel camera, a beefy 1.2Ghz quad-core processor and Near Field Communications (NFC) technology for contactless payments.

Opt for the Lumia 640 XL and the spec sheet isn’t too different, except you’ll get a larger 5.7-inch 1080p display, a 13-megapixel camera for 189 Euros. That’s about £135.

Both new Lumia kits feature a free 12-month subscription to Office 365, which is pretty sweet if you’re all about productivity.

And although both run Windows Phone 8.1 out of the box, they’ll both be upgradable to the latest Windows 10 software when it's made available.

Naturally, Microsoft is offering them in the Lumia range's trademark range of colours. These are: blue, orange, cyan and white.

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A powerful blast of frigid, Arctic air, which is being aided by a filament of the polar vortex, has begun smashing longstanding temperature records, from the Ohio Valley to the mid-Atlantic states.

The eastern U.S. is currently gripped by the most unusually cold air of any region on Earth, based on computer model data showing global temperature departures from average, with temperatures between 25 and 45 degrees below average or more.

In Chicago, which is no stranger to cold weather, the Arctic outbreak has threatened records last set in the late 19th century for the coldest high temperatures so late in the season. Typically, the coldest weather occurs in January, and it is more difficult to smash all-time record cold temperatures in February, but this airmass — which is coming via a direct flight from Siberia — seems to be an overachiever.

Dozens of other locations set record lows on Thursday, including Cincinnati, Nashville and Lexington, Kentucky. Most locations in Kentucky were mired in the single digits to low double digits as of 2 p.m. ET, which is astonishingly cold for mid-February. In Bowling Green, for example, the daily record cold high temperature for Thursday is 23 degrees Fahrenheit, set in 1936.

The forecast high for that location on Thursday? Just 10 degrees Fahrenheit. The low temperature of minus-7 degrees in Bowling Green on Thursday morning was the coldest temperature recorded there since January 1994.

In eastern Kentucky, where there's a deep layer of freshly fallen snow, temperatures plunged overnight to around 20 degrees below zero on Thursday morning, with similar lows also possible on Friday morning.

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 Tuesday's lauch event, it was seen as telling that Apple only showed off its Apple Watch being worn on the left wrist, i.e. the way most right-handers wear a watch.

The omission of users wearing it on their right wrist was seen as evidence of a design fault that meant that those who wore it this way would obscure the screen every time they used the 'digital crown' dial to interact with their smartwatch.

But now comes word that you can wear the Apple Watch left-handed too. And without undue fuss.

Apple told SlashGear that you can indeed choose to orient the watch face the other way. So if you turn it upside down, and you can wear it on your right wrist.

The straps are also swappable, so they won't be inserted the 'wrong' way.

apple watch big blue

But here's the compromise – because the watch is upside down, the Digital Crown will be on the bottom left side of the watch face when worn on the right wrist.

That might make it slightly more fiddly to use, but it'll be a lot easier than reaching around and obscuring the screen.

Apple unveiled the Apple Watch on Tuesday night. It comes in either 1.5-inch or 1.7-inch screen sizes. It comes in three varieties with 22 designs in all. So you won't be short of choice.

The Digital Crown works like a Click Wheel on an old iPod, letting you zoom in, scroll through menus. It also works as a home button. But you can also swipe the screen, so the touchscreen U.I is very much present and correct too.

The Apple Watch will go on sale early next year. No UK price has been set, but in the US it will start at $349 (£215).