Only limited Windows Phones are eligible to be upgraded to the latest Windows 10 Mobile release. The second generation Lumia (x2x series) are unfortunately no longer supported by M$ to run Windows 10.
This document provides steps to update a Nokia Lumia 1020 to Windows 10 Mobile build 10586. It involves downloading tools, unlocking the bootloader, editing the registry to modify device settings, rebooting, checking for updates, and resetting the phone a
The phone says there is no more update available. Is the 8.1 --> 10 update made like this, or am I supposed to be able to run the latest W10 OS build on my 1020?