However, the reason of the limited support of phones was caused by the restrictions on system partition sizes on handsets set by manufacturers, which didn’t permit Microsoft to perform an in-place upgrade. To overcome this issue, the company has been working on a new feature called “partition stitching” that allows Windows 10 to resize the system partition dynamically, opening the door to upgrade more phones. While the company still cannot set a specific release date, the next build of Windows 10 for phones will support a wider variety of Lumia phones:
Lumia 1020 Lumia 1320 Lumia 1520 Lumia 520 Lumia 525 Lumia 526 Lumia 530 Lumia 530 Dual Sim Lumia 535 Lumia 620 Lumia 625 Lumia 630 Lumia 630 Dual Sim Lumia 635 Lumia 636 Lumia 638 Lumia 720 Lumia 730 Lumia 730 Dual SIM Lumia 735 Lumia 810 Lumia 820 Lumia 822 Lumia 830 Lumia 920 Lumia 925 Lumia 928 Lumia ICON Microsoft Lumia 430 Microsoft Lumia 435 Microsoft Lumia 435 Dual SIM Microsoft Lumia 435 Dual SIM DTV Microsoft Lumia 532 Microsoft Lumia 532 Dual SIM Microsoft Lumia 640 Dual SIM Microsoft Lumia 535 Dual SIM
The list above shows the intended Lumia phones support for the next build, but Microsoft still testing the validation of each device, which indicates that the list could change depending on problems that may arise at the time of the release. Update, April 8, 2015: Microsoft announces that it will release a new preview of Windows 10 for phones on Friday, April 10, but the Lumia Icon and Lumia 930 won’t be supported Source Microsoft All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.