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Published: 6 days ago | Applies to:

Microsoft has released build 14977 for Windows 10 Mobile Insider Preview. Learn inside about what's new in this build and how to download it.

NOTE : This article is updated whenever a newer Windows 10 Mobile Insider Preview build is released.

Microsoft has started rolling out Windows 10 Mobile for end users. But like Windows 10, they’re keeping Windows Insider program alive for Windows 10 Mobile as well. Hence, the company is expected to keep releasing new builds for Windows Insiders.

Now, the development team has now released Build 14977 for Windows 10 Mobile Insider Preview under Fast ring. Following are the models that’s are eligible to get this build update:

Nokia Lumia models:

Lumia 1520, Lumia 636, Lumia 638, Lumia 720, Lumia 730, Lumia 730 Dual SIM, Lumia 735,  Lumia 830, Lumia 920, Lumia 925, Lumia 928

Microsoft Lumia models:

Microsoft Lumia 430, Microsoft Lumia 435, Microsoft Lumia 532, Microsoft Lumia 532 Dual SIM, Microsoft Lumia 640 Dual SIM, Microsoft Lumia 640 XL, Microsoft Lumia 535 Dual SIM, Microsoft Lumia 650, Microsoft Lumia 930, Microsoft Lumia 950, Microsoft Lumia 950 XL

Now lets see what steps you need to perform, in order to get Windows 10 running on your mobile:

How To Download Windows 10 Mobile Insider Preview

1. Join the Windows Insider Program using below mentioned link. If you’ve already joined the program while getting Windows 10 for desktop, then you don’t need to join it again.

Join Windows Insider Program

2. Next, download the Windows Insider app from following link:

Download Windows Insider App

3. After installing the app, open it and use your Microsoft account (on which you’ve signed for Windows Insider program). Here, you have two options. First option gives is for Insider Slow, means the build released in this ring aren’t latest one and they may have less bugs; while in case of Insider Fast you’re set to get latest and hottest build but it may have more bugs.

Download Windows 10 Technical Preview Build 10051 For Phones

From here, you can follow on-screen instructions to proceed, just like you install updates in Windows Phone. Once installation succeeded, you can have Windows 10 running on your phone.

What’s New In Windows 10 Mobile Insider Preview Build 14977

This build adds the functionality to read EPUB books in Microsoft Edge on your phone.

You can read about things fixed and known issues in this build and more at Windows blog:

Read more at Windows blog

Hope you enjoy this build of Windows 10 Mobile! Go here to learn how to uninstall Windows Mobile 10 and re-install Windows Phone 8.1.

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  • sir can you tell me how to install this on my Lumia 520 or will it work on that? I would like to have it run on my phone soon please reply

  • Kapil Arya

    ^^ It’s yet to arrive arrived for Lumia 520, please wait :)

  • Nice info kapil I want to ask is there any specified memory req for our phones how much space we need at least??

  • Kapil Arya

    ^^ At least 8 GB.

  • hey when i open app it says check the system requirements n dnt let me to dwld new preview?!! wat shud i do pls help

  • Kapil Arya

    ^^ It’s only available for the Lumia models mentioned in the article. On other phone models, you won’t be able to proceed. It’s available for more models now. Article updated!

  • Hello I am having some trouble with my Nokia Lumia 520. I can`t personalize my start screen and lock screen; another issue is that I can`t find the Spartan browser and battery saver does not enable. please answer me. Thnkx

  • Kapil Arya

    ^^ These are known issues and Microsoft is working on them. You need to wait for next build arrival, and I hope it would fix them :)

  • Should I install it on NL 920?

  • Kapil Arya

    ^^ There are still some known issues. Do read them first via link mentioned in article, and then decide yourself should you upgrade or not :)

  • Can’t download insider app

  • Kapil Arya

    ^^ What happens when you do so?

  • My NL 1320 says no builds found. When itry the suggested alternate log in, I still run into the same problem.

  • Kapil Arya

    ^^ Have you enrolled into Insider program? If yes, try shifting to Slow ring from Fast ring and vice versa, see if it helps.

  • What about lumia 540 ?

  • Thank you Kapil! Actually my Lumia 636 had gotten stuck on build 10586 but your solution resolved!

  • Kapil Arya

    ^^ Great! One of my Lumia running 10586 crashes frequently. I believe I too upgrade it now to 14291.

  • Sir , the Insider Preview Build 14295 is available also for lumia 1020 ???? Because MS not roll out win10 for lumia 1020

  • hi please tell me kapil is nokia lumia 530 dual sim will get win 10 in feature??????

  • i can not download this build on my lumia 925 ,it says your phone is up to date .I am on build 10586

  • Kapil Arya

    ^^ Please confirm that you’ve selected Fast configuration in Windows Insider app.

  • in my lumia 630 not dowload this build , it says your phone is update

  • Kapil Arya

    ^^ Make sure you’re in Fast ring of Insider program.

  • Hey,
    i use the lumai 830 , wen i was using the 8.1 version the camera quality was superb.
    after upgrading the phone to 10 the clarity has come down. what would be the reason for that

  • Kapil Arya

    ^^ Odd! You may try updating to a newer build and see if this helps. You can also try another lens or app with different settings :)

  • can I download this build on my lumia 1020?

  • when I check for update always is: up to date (i’m in fast ring) and can’t connect to internet or server busy :(
    pls help me

  • Kapil Arya

    ^^ Make sure you’ve Windows Insider app installed. If the app doesn’t exists, your phone won’t detect latest builds.

  • Is there any way possible to hack/force an upgrade to a phone that Microsoft has dropped from the list? I am running an HTC One M8 with build 10586 Which works fine under that version and would like to upgrade to current builds.

  • Kapil Arya

    ^^ Sorry, there might be way but I don’t have any idea about it.

  • cant detect any build for nokia lumia 920
    pls help

  • Kapil Arya

    ^^ Make sure Windows Insider app exists on your phone configured to Fast ring configuration.

  • sir i have lumia 730 running mobile build 14951(fast ring)..but am not able to update latest mobile build 14965..always show device up to date.there is any solution?

  • Kapil Arya

    ^^ It might be that the build is not offered for your device. Kindly wait till next build arrives. If the problem continues, reinstall Windows Insider app and re-configure it.

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