Known Issues of Latest Windows 10 Mobile Phones

As we all know by now, Microsoft has released next build version 10051 of Windows 10 for Phones. This is still a technical preview version of Windows 10 for Phones. Latest Windows 10 build 10051 is not a production version of Windows 10 for mobile phones. Hence, you need to be careful before upgrading your primary phone to this pre prod version 10051 of Windows 10. I’ve upgraded my primary phone Lumia 635 to Windows 10 build 10051 (Windows 10 TP version for Phones 10.0.12534.56). Have a look at the list of known issues listed down before taking the decision of upgrading the phone. I’ve maintained known issue list for previous build version 9941 Known Issues Identified with Windows Phone 10. I’ll go through the new features (and known issues if I find any) in details once I start using the latest build for couple of days. Biggest problem with this release is alignment of screens.


IMG_20150411_013148List of supported device details for 10051 Windows Phone is posted in here Next Build of Windows 10 for Phone will be Released on Friday. Microsoft has enough time to fix “most” of those issues before production release of Windows 10. Keep updating about the issues which you faced on Windows Phones after Windows 10 upgrade. I’ll try to keep this list updated. More Info about known issues in Windows site here.

When an alarm is triggered, Dismiss button won’t be visible on my 630 Lumia after the upgrade Windows 10 Phone.


[table caption=”Windows 10 10051 Build Known Issues with Windows 10 Phones” class=”table table-bordered” ai=”1″ width=”400″ colwidth=”150|50|300″ colalign=”left”]

Issue, Workaround

About 1% of the time incoming phone calls may not play a ringing sound.,
Call + SMS filtering will not work after upgrade.,
Flight mode cannot be enabled.,
Data connections can’t be disabled.,
You may need to re-pin the Phone app after upgrade.,
On phones with 512MB of memory apps can randomly crash due to an issue with memory management.,
The Insider Hub is now included on Phone but may fail to launch on some phones.,
There might be situations in which auto-upload of your Camera Roll to OneDrive may not be working, Please be sure to back up your photos especially if you need to use the Windows Phone Recovery Tool to go back to Windows Phone 8.1.
Also for people upgrading their phone from Build 9941 the tiles on your Start screen for the Camera and Photos apps may be missing or corrupt, You will have to unpin any corrupt tiles and re-pin the apps to your Start screen.
On some phones – due to a scaling bug the dismiss button won’t be visible when an alarm is triggered, To stop your phone from “alarming “just touch the arrow and swipe up on the notification and off the screen to end the alarm.
The Office Hub has been removed from this build. You won’t be able to open Word Excel PowerPoint or OneNote files in this build, Preview versions of the universal Office apps will be available in the coming weeks.
All Bluetooth-based interactions with Cortana are not working in this build because we’re reworking how Cortana interacts with Bluetooth. This includes dictating and reading text messages, initiating searches and chit-chat and all system-level control (such as playing music launching applications or navigating settings.
After upgrade some apps that have been installed onto a SD memory card will fail to launch, To fix this uninstall and re-install the apps.
For people upgrading their phone from Build 9941. there is a bug in which your phone’s MMS settings will be lost after upgrade. The new Messaging app doesn’t yet have the ability to re-enter these settings, You will need to use the Windows Phone Recovery Tool to go back to Windows Phone 8.1 and then upgrade to this build to get MMS working again.


5 thoughts on “Known Issues of Latest Windows 10 Mobile Phones”

  1. Data cannot be disabled.. which means of you want to log into a hotspot that requires credentials to entered through a landing page it will not work. The phone tries to bring up the landing page by navigating to “”.. but it doesn’t turn data off, which means the actual page is always loaded using mobile data , and you never get the landing page.

    This means logging into public hotspots at airport, café, companies etc is out!

    Also the field for proxy server when creating a new internet apn manually does not store the value. It is always gone when you reopen it

  2. After install the Windows 10 Preview My Mobile Lumia 640XL is working very Slow & creat many issue likely Music and Video App mising, Mobile data countinue on, Photos not show, many time Memory Card and Second sim not find & etc.


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