Windows 10 Mobile build 15204 Discussion (Redstone 3; Fast Ring)


Oct 23, 2013
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From Microsoft

Microsoft rolls out Windows 10 build 16176 and 15204 for PC and Mobile Insiders | Windows Central

Changes, improvements, and fixes for Mobile

  1. We have added a new privacy page to the Windows 10 Mobile OOBE experience that allows you to quickly and effectively make common privacy changes while setting up the device. You can read more about our Windows 10 privacy journey here.
  2. We fixed the issue where the keyboard would sometimes not appear when a text input field is selected in Microsoft Edge.

Known issues for Mobile

  1. FYI: If you receive error 800b0109 while attempting to download this build, navigate to Settings > Update & security > Windows Insider Program and check for a restart message – please restart your device from there and then check for updates again and should be able to download the build as expected.
  2. For Insiders who have upgraded from a prior 150xx build to this build, the “Add Bluetooth or other devices” Settings page and the Connect UX page may fail to open.
  3. 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.
  4. There is an issue with Microsoft Edge where you might get into a bad state after opening a new Microsoft Edge windows and screen off with the JIT process suspended.
  5. Continuum will stop working when HP Elite X3 case is closed.
  6. Continuum hangs or renders incorrectly after disconnecting on devices like the Lumia 950.
  7. The device screen might stay black when disconnecting from a Continuum dock after screen has timed out normally.

This build and version is the latest Redstone 2 build in testing for Mobile Insiders on the Fast Ring.

Issues? Bugs? Solutions? For all things build 15204, discuss it here.

[NOTE]Tip: Check out this thread before posting[recommended-guidelines].html#post3467172[/NOTE]
Is your device behaving oddly, is something just not right? This is the place for discussion of software and hardware issues!
[TIP]Here is some useful information you may find yourself needing.
Some issues with responsiveness and app delays can be resolved by either restarting your phone or performing a Soft Reset.

If things get a bit more serious, you may opt to perform a hard reset or software reset.

Lastly, if things really get serious, you may need the Windows Device Recovery Tool to recover your phone back to working order - head over to the Microsoft FAQ Page for more information.

Make sure you check the official Windows 10 Mobile Support Page as well for some of the most common tips and trouble shooting guides.[/TIP]
[INFO]Restarting your phone involves turning it off and then turning it on again. Turn off your phone by pressing the power button until you are prompted to "Slide down to power off". Turn your phone on again by pressing the power button until it vibrates.

A soft reset is similar to pressing the reset button in PCs and has the same effect as pulling out the battery of your phone and then putting it back in. For phones with non-removable batteries, press the volume down and power button together until your phone restarts. Be aware that when using Windows 10, the voume down and power button combination will also launch Windows Feedback. Just continue to hold down the buttons for a full 10 seconds in order to trigger the soft reset. For phones with removable batteries, you can either opt for the button combination or remove the battery and then return it.

A hard reset or a software reset will reformat your phone by removing all the user information leaving only the bare OS and firmware currently installed in your phone. It does erase data so you should always keep a good backup of your phone just in case you have to resort to this option.

The software reset can be done by going to your phone Settings > System > About > tap on "Reset your phone." You will be prompted once before doing this just to be sure. Be sure, also, to have everything backed up since there would be no way to recover all of your files.

The hard reset accomplishes the same thing as the software reset, but can be accomplished when the phone is non-responsive and you are unable to enter into settings. To perform the Hard Reset, "Power off the phone > hold Volume Down > press Power > keep holding Volume Down until you see the exclamation (!) screen, then immediately release the Volume Down. Now tap Volume Up / Volume Down / Power / Volume Down. You should see the spinning gears and your phone will reflash the last OS version held in recovery.

The Windows Device Recovery Tool is the final option, for example for "bricked" phones that would no longer turn on, be charged, etc. This can be used to either roll back to a previous OS version or force an update to a more current OS version[/INFO]
Remember, when reporting bugs be descriptive! The more information you give, the better the chance someone will be able to help you.

What OS version? Any special conditions that should be noted? What were you doing? What is the result? Any error codes or messages given? What have you tried for solutions? What variant of the phone are you using? Single SIM or Dual SIM?

Please describe as much as possible about the bug so others may try and replicate the bug and don't make suggestions for solutions that you have already tried which have failed.
[INFO]When reporting bugs/issues, please also use the Windows Feedback app to report issues directly to Microsoft. Microsoft don't actively read forums looking for people reporting issues when they have a data collection system built right into the operating system. They use WF to analyse numbers and prioritise fixes (issues with more reports, get sorted quicker).

"You can use the Windows Feedback app to tell us which features you love about your Lumia with Windows 10, or when something could be better.
1.To launch the app, swipe over to the App list, and then select Windows Feedback.
2.See if someone else has given similar feedback by entering the topic, such as Microsoft OneDrive.
3.If you find similar feedback, tap the Upvote or tap on the feedback to open it, write the problem details to Add details-field and tap Send.
4.To narrow your search to a specific topic, you can filter the results by picking the category that matches your feedback the closest. For example, for feedback about the Microsoft OneDrive, select Apps and Games > OneDrive.
5.If you don’t find any similar feedback, tap + to add new feedback. Select the correct category and subcategory from the dropdown-list.
6.Enter your feedback (the more details the better!), add a screenshot if you can, and tap Send.
7.Your feedback will automatically upload when you are charging your phone and connected to Wi-Fi, but you can also upload the feedback manually by tapping … > Upload feedback data."

Long Syntax

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Jul 3, 2012
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Thx for posting the clarification nicosxri. Seems a shame that MS drops a bomb like this on a long weekend and just walks away, leaving others to scrounge around for unclear details.


Oct 23, 2013
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Updated but I quote, this is not a OneCore build...

This is a result of more work we’re doing to converge code into OneCore – the heart of Windows across PC, tablet, phone, IoT, HoloLens, Xbox and more as we continue to develop new improvements for Windows 10 Mobile and our enterprise customers.

Ariel Takom

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Aug 9, 2015
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I'm not sure why, but I'm getting an error that says: Some update files aren't signed correctly. The error code given is 0x800b0109. Anyone facing this issue as well? I did read that this affected some 0.1% of users but IIRC it was only happening to the Idol 4S users.

Mark F24

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Oct 12, 2014
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I did an off hours update as I was not using my 950XL for the last couple of days. I left it with 100% battery at 11:30, this am it was on the new accept screen with 46% battery, funny the screen didn't time out. When I have done a hard reset it gives up waiting and goes to sleep.

Well I am going to give it a test drive today.

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