It turns out; you can actually upgrade your unsupported Windows Phone to get the Windows 10 Creators Update mobile OS after all. Yes, despite the fact Microsoft said only 13 Windows Phones will be eligible for the upgrade. You can in fact upgrade your unsupported (not within the list of 13 supported) Windows Phones to the latest Windows mobile OS.
Just how do you go about upgrading unsupported Windows Phones to get the Creators Update? Well, it is not a hack, if that is what you are thinking. Actually, Microsoft itself has given out a guide on how you go about upgrading unsupported devices. The argument the company puts forth is that while these devices are not eligible for further feature updates, they are still supported by Microsoft as far as cumulative updates go.
Below is a walkthrough on how to get the Creators Update as cited by MSPowerUser.com
How to upgrade unsupported Windows Phones
Scenario I: You have an Unsupported Device but already on Windows 10 Creators Update (Build 15063): If that is your device, go to Settings > Update & security > Windows Insider Program and move …read more