After a very well hidden tease this morning, Dona Sarkar and the Windows Insider team have finally pushed the red button and released Windows 10 Insider Preview Build 14977 for Mobile devices in the Fast Ring only. Unfortunately, according to Dona, there will not be a PC build this week due to a blocking bug that could result in broken apps after updating to a new build. Despite this, a mobile build has still been released, so here is a short look at the known issues with Windows 10 Insider Preview Build 14977 for Mobile.
- Please avoid attempting to install new languages, keyboards, and speech packs on your phone. There is a chance these downloads may get stuck and not finish downloading. If you have existing languages, keyboards, and speech packs installed – they will carry over when you update to new builds. You can use Windows Device Recovery Tool to go back to Windows Phone 8.1 or Windows 10 Mobile, install any languages, keyboards, and speech packs you need and then update to the latest build in the Fast ring as a workaround.
- Windows 10 phones with 8GB of internal storage such as the Lumia 550 and 650 will likely receive an 0x800700b7 error when attempting to update to this build.
- System related notification toasts (e.g. Bluetooth, USB/Autoplay, etc.) do not work
Happy downloading, and do let us know if you've experienced any other issues after installing this build by dropping us a comment below!