Microsoft has just released the first Windows 10 build to the Fast ring this week, build 15063, which comes to both PCs and phones. This new release has been long awaited by mobile users, who last saw an update with build 15055 on March 10.

We may now only be a short time out from the RTM version of Windows 10 for PCs, even though mobile users will have to wait a little longer before receiving an RTM version of the OS. So, don't expect any new features for this build, but only improvements and bug fixes.

Here are the fixes for mobile:

We fixed the bug causing a number of inbox apps to fail to launch (such as Store) and also preventing any app updates from the Store from working. Thank you all for sending us feedback around this.

We fixed the bug causing background tasks to not run in the background like they should such as OneDrive’s camera roll sync feature. Background tasks should be working again as expected and your camera roll will sync to OneDrive again.

We fixed the issue where in some cases you may lose your call, text, and email history may be lost if your device experiences an unexpected reboot.

Speech Packs should download and install normally.

We fixed an issue for Insiders with certain cars resulting in connection failures after pairing Bluetooth.

We fixed an issue where replacing the default APN for LTE on the phone wouldn’t work.

Here are the known issues for mobile:

Updating from the Windows 10 Anniversary Update (Build 14393) directly to this build won’t work. There will be an extra hop required to get to this build. If you use WDRT to go re-flash your device and join the Fast ring, you will not be offered this build and instead offered Build 15055. Once you’re on Build 15055, your device will find Build 15063 and take the update then.

Some users are reporting that pages are constantly reloading or refreshing, especially while they are in the middle of scrolling them in Microsoft Edge. We’re investigating.

If you're on the Fast ring, you can grab today's build by going to Settings -> Update & security -> Phone update -> Check for updates. If not, head over to the Windows Insider Program tab, tap 'Get started', and when your phone reboots, go back and set it to the Fast ring.