Sony Xperia Z5 features with 5.2 inches 1080 x 1920 pixels display and is equipped with Qualcomm Snapdragon 810 processor alongside 3GB RAM and 23 MP rear camera.

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device is stuck in a loop optimising applications - cannot reboot

says optimising 55 applications - gets to 55 then says starting applications - then seems to reboot with SONY logo followed by Android logo followed by wavy pattern - then starts with 1 of 55 optimising applications again - and again

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Follow the steps in this guide. System Software is most likely corrupt and needs to be restored.

Factory Reset, Fix Android Problems with Sony PC Companion

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