Apart from the major Windows 10 Preview Build 16125, Microsoft has also released a Feature2 Preview build for Mobile insiders. The Windows 10 Mobile Build 15222 (10.0.15222.1000) is a disappointment in terms of new features just like its predecessors.

It, however, packs number for fixes and improvements that may make your life bit easier if you are in Fast Ring of Insider Preview. It includes fixes and improvements from last two cumulative updates for Creators update. The copyright issue date has been fixed in Settings. In

In improvements we can see reliability of notifications for apps that pair with a Bluetooth device. The Time & Language settings page UX for Speech and Keyboard language downloads has also been improved to make it easy to know when to restart after installation of language packs.

Windows 10 Mobile Build 15222 Changelog:

  • This build also includes all the improvements from KB4016871 and KB4020102.
  • The copyright date is correctly showing 2017 now under Settings > System > About.
  • We fixed an issue where WhatsApp would not launch after updating to the latest Mobile builds.
  • We fixed an issue with using the Japanese 12 Key soft keyboard where the “right arrow” key did not input a space
  • We fixed an issue with the Bulgarian keyboard localization for the HP Lap Dock in Continuum.
  • We have further improved the reliability of notifications for apps with a paired Bluetooth device, such as Fitbit.
  • Improved the Time & Language settings page UX for Speech and Keyboard language downloads. Previously, the status would show “Downloading” for speech and “Installing” for keyboard. Unless, the user tapped on the language or navigated to the Update & Security settings page, there was no indication that a restart is required to complete the installation. Now when the update reaches the reboot pending state, a “Restart Required” is displayed under the language.
  • We fixed several enterprise device management issues.
  • We fixed an issue where notifications and Cortana’s cross-devices settings on your device were not being mirrored to your PC.

Source: Windows Blog