Next Windows 10 Technical Preview for phones build will expand to a massive number of devices

When Microsoft rolled out the first build of Windows 10 for phones to Windows Insider participants, the company only allowed a select few handsets the ability to install the preview version of the company’s next mobile operating system. This was due to a “system partition” issue. Now, the company has revealed that the next build of Windows 10 for phones will support “a lot” more phones.

According to Microsoft, the “vast majority [of phones] will be supported with the next flight.” Support will also be added for phones that didn’t have China Mobile Operator support in the last build. Here is what Microsoft had to say:

“We still have some work to do to validate individual phones, as well as the builds that we’re flighting through our internal rings. As I said in the post on frequency I cannot guarantee a date for a new build. What I CAN tell you is that we feel great here about the partition stitching code and current builds, but we likely still have at least one more week of engineering to do to ensure we get a great build for the expanded list of devices.”

Following along the latest Windows 10 build for PCs, the new Windows 10 for phones build will be delivered on a similar cadence — meaning, builds will be delivered faster than before. The reason we haven’t seen a new build sooner is because of the partition stitching issue.

“The latest build for PCs is the first build that we’ve delivered on that new cadence. We expect the same principles to hold for phones as well as PCs, but the first step for us was to get partition stitching done so that we could unlock a much larger set of phones for you to use for Windows 10 technical previews.”

Barring any last minute bugs, these are the phones that will be supported when the next build arrives (no specific date was given):

• 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, and Microsoft Lumia 535 Dual SIM.