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We fixed the issue causing your phone to lock up and reboot when it receives a notification from an app that has “Keep notifications private on the lock screen” turned on under Settings > System > Notifications & actions. We fixed the issue where some users with some non-English keyboards were not able to enter letters such as w, y, and a when typing into the address bar of the Edge browser.
We have fixed the issue causing DRM-protected content from services like Groove Music, Microsoft Movies & TV, Netflix, Amazon Instant Video or Hulu to fail on playback with 0x8004C029 or 0x8004C503 errors.Language and Speech Packs should download without any errors.
We fixed an issue causing installation of mobile builds to fail with Error 80070002. Windows 10 Mobile Redstone Build 14342 bring a huge number of new features, but also a long list of fixes for bugs introduced in previous builds.