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Today's Tech: Cameron calls for public boycott of social networks after abuse soars and LG launches new flagship G2 smartphone

Prime Minister David Cameron has called for the general public to boycott social networking sites that fail to deal with online abuse. He spoke in the aftermath of the death of 14-year-old Hannah Smith, from Leicestershire, who is believed to have killed herself as a result of cyber-bullying. "I think there are some steps that need to be taken," Cameron told the BBC. "First of all, the people that run these websites have got to step up to the plate, clean up their act and show some responsibility." Hannah's father said he found messages telling her to die on the website, which allows users to post anonymous questions and answers online. "If websites don't clean up their act and don't sort themselves out then we as members of the general public have got to stop using these particular sites and boycott them," added Cameron., which is based in Riga, Latvia, has reached out to Leicestershire police and issued a statement, saying, " actively encourages our users and their parents to report any incidences of bullying, either by using the in-site reporting button, or via our contact page."

BlackBerry has unloaded three senior vice presidents as part of its ongoing restructuring programme, while it fights to maintain a meaningful presence in the smartphone market. CBC News reports that Doug Kozak, vice president for corporate information, technology operations; Carmine Arabia, senior vice president of global manufacturing and supply chain; and Graeme Whittington, vice president for service operations, have gone. BlackBerry said, "We are in the second phase of our transformation plan where we will be assessing our organisation, from top to bottom, to ensure we have the right people in the right roles with the right skill sets to drive new opportunities in mobile computing." In 2012, BlackBerry announced it would be axing around 5,000 jobs as part of its restructuring plan. The company's second quarter results will be posted in September.

Despite the growth in tablet shipments, a major decline in PC sales has stalled the worldwide market for PCs and tablets, according to market research firm Canalys. In the second quarter, worldwide tablet shipments managed to grow 42.9 per cent year-over-year while the desktop and laptop markets shrunk 7.4 per cent and 13.9 per cent, respectively, compared with the same period in 2012. Combined, total client PC shipments of 109 million units in the second quarter marked just a 0.3 per cent gain over the 108.7 million units shipped in the second quarter of 2012. The research firm's numbers jibe with earlier reports on second-quarter PC shipments, absent tablet figures, from Gartner and IDC. But within the context of a stalled overall market, some makers of PCs and tablets are doing better than others. Lenovo in particular enjoyed a strong second quarter, gaining share in its core notebook and desktop categories, as well as boosting its tablet shipments to 1.5 million units in the last quarter. Apple, though, still has a leg up on the rest of the competition, by the research firm's numbers, ranking as the top vendor of client PCs with a 4.5 million-units-shipped lead in the second quarter over runner-up Lenovo.

LG has unveiled its new flagship smartphone, the G2, amidst much fanfare at a launch event at New York City's Lincoln Centre. The LG G2 has a 5.2in full HD [1080p] display, a Qualcomm Snapdragon 800 2.26GHz quad-core processor, 2GB RAM, 13-megapixel rear camera with optical image stabilisation (OIS), and a raft of new user features. The G2 is the first device anywhere to feature the new Qualcomm Snapdragon 800 processor and the speed of the phone alone is likely to attract many buyers to take the plunge – even if the appearance is more a phablet than a smartphone. The device has moved the buttons from the side of the phone to the back and it's something that has been done to "maximise user convenience and make the body [of the smartphone] even slimmer." The phone will be rolled out 130 international carriers over the next eight weeks with South Korean consumers the first to get their hands on the shiny new device.