Just one week after the previous build (15043) we have a brand new Windows 10 Mobile version, build 15047, for all those on the 'fast' Insiders ring - highlights are more bug-fixes, but then we're getting ever closer to a first production build of the Creators Update (Redstone 2), so we're really just polishing rough edges at this point.

From Microsoft:

Today we are excited to be releasing Windows 10 Insider Preview Build 15048 for PC and Build 15047 for Mobile to Windows Insiders in the Fast ring.

Other changes, improvements, and fixes for Mobile

• Adding a new card / paying with an existing card works again Microsoft Wallet.
• We fixed an issue resulting in the play/pause buttons when watching videos in Microsoft Edge taking two taps to work immediately after opening the video full screen.
• We fixed an issue where the Data Usage page in Settings might be unexpectedly missing info about cellular data usage.
• We fixed an issue resulting in certain characters on the Polish keyboard not working in Continuum when typing in the Microsoft Edge address bar.
• Cortana’s background is now black rather than the previous dark grey.
• We fixed an issue where after some time the -word option might stop appear in the candidate pane for words added to the typing dictionary.
• We fixed an issue resulting in task switcher being unexpectedly slower to launch in recent flights.
• We fixed an issue resulting in a flicker on certain devices, such as the Lumia 950, when interacting with the Maps app after rotating the phone into landscape mode.
• We fixed an issue where dragging the position indicator in the video progress slider in Microsoft Edge would back to 0 upon release.
• We fixed an issue resulting in notifications from SIM 2 on dual SIM phones not appearing in the Action Center.

Known issues for Mobile

• Speech packs may be unable to download on this build.

How many Fast ring builds will we get before Redstone 2 will finally 'ship' to production phones? My guess is another three, taking us to the last week in March, following which we'll have the official release and then some extra 'Release Preview' builds to tidy final bugs up through April/May.

Which means that at some point soon after the Creators Update hitting, many Fast ring Insiders here might like to consider switching to that (RP) ring, otherwise you'll start to get shunted off into Redstone 3 early builds, and those will be pretty unstable for a while. Just something to think about!

See also my summary of what's new going from Redstone to Redstone 2 (Anniversary Update to Creators Update).

Anyone with an existing phone that's officially deemed Windows 10 Mobile compatible by Microsoft can join in the fun. The full list of phones includes Lumia 430, 435, 532, 535, 540, 635 (1GB RAM version), 640, 640 XL, 730/735, 830, 930, 1520, Icon, BLU Win HD w510u, BLU Win HD LTE x150q, and the MCJ Madosma Q501. Plus, of course, all the devices which have shipped with Windows 10 Mobile in the last year, of which the Lumia 550, 650, 950, 950 XL, Acer Jade Primo, Alcatel IDOL 4S and HP Elite X3 are the highest profile.

In each case:

1. Upgrade to Windows 10 Mobile (if appropriate) using the Upgrade Advisor.
2. After at least one update cycle you should then be on the Anniversary Update (a.k.a. Redstone). Head into Settings/Update & Security/Windows Insider Programme
3. Join the Insiders programme and choose the 'Fast' level in the pick list.
4. Within a few hours your phone should be seeing the build mentioned above and you'll be running next year's mobile OS today. Fun, fun, fun....!