hello! lumia 520 not wake up, when press d power button shows " unable find bootable option. press key shutdown". use windows device recovery tool alas! shows on desktop 'operation ended failure' , 'this software not correctly signed or not signed device'
hi,
we know have exhausted known troubleshooting steps. since perform windows device recovery tool, please reach out b2x further assistance.
for future queries, don't hesitate us.
regards.
Mobile Devices / Microsoft Lumia and Nokia Lumia / Software update / 500-series
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