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As all the flagships are receiving a taste of lollipop, Sony has also rolled out updatesfor Z3 and Z3 compact. But if you are wondering when will your sony device will get the update, its very soon as Sony recently announced that a number of devices will receive lollipop update very soon. 1/2 #softwareupdate : #Android 5.0 rolling for Xperia Z2 & Z2 Tablet. Rollouts are phased, pls check locally & watch for the notification. — Sony Xperia News (@SonyMobileNews) April 7, 2015 2/2 #Xperia Z3 Dual, Z1, Z1 Compact and Z Ultra next week, followed shortly after by T2 Ultra & C3. Then Z Series - more on timings soon. — Sony Xperia News (@SonyMobileNews) April 7, 2015 They also mentioned in a tweet, that they will begin rolling 5.0 lollipop update on  Xperia Z3 Dual, Z1, Z1 Compact, T2 Ultra, C3 & Z Ultra Lollipop update will bring to your Sony device a design overhaul with new transitions and animations. The company has uploaded a video showing o...

bootloader on  is a set of codes that runs before the actual OS runs this is locked by the manufacturers as they want users to use their custom made ROMS and prevent you to flash other ROMS so if you unlock your bootloader it voids your warranty. sony is known to be very dev friendly and has posted a video on its youtube dev channel which shows the procedure for unlocking bootloader of xperia devices. they state that the procedure can void warranty and is not recommended for standard users to unlock your bootloader go here -  http://developer.sonymobile.com/unlockbootloader/ select your device download SDK and fastboot drivers intall all USB drivers by running SDK manager copy fastboot file to USB drivers enable USB debugging turn off your phone and connect it via USB and unlock it via fast boot