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Today's Tech: all the news from MWC 2013, Samsung Galaxy S4 launch confirmed, and Microsoft falls victim to hack

It's official! Samsung today confirmed it will launch the Galaxy S4 on 14 March at a special Mobile Unpacked event in New York City. It will be the first US launch of a major Galaxy device in three years, said Samsung spokeswoman Chenny Kin, and the new device is likely to reignite the battle between Samsung and its arch rival Apple.

Alongside the new flagship Galaxy S handset, the Korean firm will also release an official Galaxy S3 Jelly Bean 4.2 update at the event, according to recent reports. However, it appears the much sought-after firmware update may already be within reach - at least for those of you with enough tech know-how to flash a custom ROM to your device. Follow the link to find out where to download the leaked firmware and catch up on all the latest Samsung news.

It has been a busy start to the week for the ITProPortal team down at Mobile World Congress in Barcelona. Will Dalton got things rolling in style last night, enjoying some hands-on time with the freshly unveiled Alcatel One Touch Idol X, a new entry into the increasingly competitive 5in segment that boasts some impressive specs, not least its Full HD display and 13-megapixel camera.

Elsewhere, we've got a hands-on preview of the Huawei Ascend P2, and plenty of excitement from Nokia, who launched two new additions to its Windows Phone 8 lineup - the Lumia 520 and Lumia 720. There was some quality spotlight time for ZTE and its 5.7in Grand Memo "phablet" as well, while HP's unveiling of a 7in Android tablet ranks as one of the early surprises of MWC. There's plenty more action to come this week, so stay tuned as we'll continue to report on all the best news from Barcelona as it happens.

Last week was replete with high-profile cyber attacks, with the likes of Facebook, Apple and, rather ironically, Anonymous confessing they had been the victims of a string of digital security breaches. Microsoft is now the latest addition to the list, having admitted that its computers were hacked in a similar way to Facebook and Apple. ""During our investigation, we found a small number of computers, including some in our Mac business unit, that were infected by malicious software using techniques similar to those documented by other organizations," the company said. Microsoft claims it has put the issue to bed, leaving us to wonder which major tech firm will be next.