Sony unveils waterproof tablet - Telegraph The Xperia Z tablet, which Sony announced at the Mobile World Congress (MWC) in Barcelona on Monday, is waterproof and dust resistant. It is expected to go on sale in May. Its release follows the Xperia Z smartphone that Sony announced last month. The Xperia Tab is intended to restore Sony's core values in the minds of consumers rather than change the tablet market status quo. The company only has modest expectations for sales of the device, which is very much aimed at the premium end of the tablet spectrum," said Tony Cripps, an analyst with Ovum. While the iPhone's maker, Apple, never attends MWC, this year Google decided to also stay away, perhaps figuring that its Android operating system would be mentioned enough around the floor of the trade show anyway. That left room for other announcements, including four new mobile phones from Nokia, all aimed at the cheap to mid-range section of the market. The cheapest, the Nokia 105, costs €15 (£13) and will run for up to 35 days on a single charge. Meanwhile, Samsung announced a new version of its Galaxy Note tablet. The Galaxy Note 8 has an 8in screen, so it will sit between the 5in Note 2 and the 10in Note 10.1. Like the other models, it comes with Samsung's S-Pen stylus. The Korean giant's biggest announcement of the year will take place away from MWC, however. Samsung yesterday issued invitations to the launch of its next flagship smartphone, the Galaxy S IV. The event will take place in New York next month.