Accidental product leaks by brands are usually minor slip-ups that are only spotted by chance, such as a premature store listing that’s quickly taken down. But Sony has leaked its upcoming flagship Xperia 1 V phone in style – by posting a massive billboard featuring the device on the side of a building.The billboard (see above) was spotted in Hong Kong before being taken down, but not before photos appeared on Reddit (opens in new tab)  and Twitter, and
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