[summary]A phablet style smartphone by Sony released in 2013. Early firmware caused the infamous Sleep of Death common to many Xperia phones.[/summary]
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[summary_image|311245]
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== Sleep of Death ==
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In many causes, firmware updates solved this issue. However, a [http://userguide.sonymobile.com/referrer.php?region=global-en&product=xperia-z-ultra#!Resetting-your-device.html|hard reset] may be required.