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Windows 10 Mobile Build 14393.321 Hands-on Review, Issues, Installation experience & more

Windows 10 Mobile Build 14393.321 is the latest RTM CU build (October update) released by Microsoft for everyone running Anniversary update on their devices. You can read the official changelog of Build 14393.321 by clicking here. This CU Build brings lots of fixes and improvements over the last cumulative update Build 14393.189.

Now we share our Impressions of the build including performance, multitasking, gaming, navigation demo, bugs & Installation experience.

Read our Windows 10 Mobile Anniversary update review and massive changelog + hands-on demo of changes vs Threshold by clicking on the links below.

⇒Anniversary update Review (Video too)

⇒Anniversary update Massive changelog & Hands-on demo of new features vs Threshold

Build 14393.321 Installation Experience:

The Installation experience has been quite smooth for us in case of the Build 14393.321. It took around 25 to 35 minutes for the build to get downloaded, installed, data migrated and the devices getting up and running.

In case it takes too much time for you try a soft reset or plug-in the phone and it may work finally. You can refer to our common issues and errors fixing guide for more. You will be usually notified for a restart when the download has completed in background. You can check our tutorial on how to prepare for upgrade to Windows 10 Mobile.

Build 14393.321 Hands-on Impressions (Performance, Multitasking, Gaming, Battery Life & more):

  • Build 14393.321 is one of the best Windows 10 Mobile builds ever when it comes to performance and fluidity.
  • It is fast and responsive during normal daily smartphone tasks like start-screen navigation, apps list scrolling, opening and closing of settings, handling calls, texts, Mails and more.
  • It runs smoothly and impresses with its responsiveness all around even on low-end devices like Lumia 550.
  • Mobile Data and WiFi connections work fine on our devices and we have even demoed it during our hands-on
  • Native apps like Store, Maps, Camera, Outlook Mail & Calendar etc work fine. Sharing works flawlessly.
  • Microsoft Edge has kept improving with every build. It loads pages faster and zooming, panning etc work appreciably well.
  • Video streaming and playing also works fine without any issue like flickering faced on very early builds and we have demoed it too.
  • Battery Life seems quite good so far during our hands-on usage of the Build.
  • Gaming also works fine and multitasking with even two heavy games open in background is rock solid
  • Multitasking for apps works impressively and apps resume really fast from background. Apps don’t crash in background while multitasking

Major Bug & Issues:

  • Bluetooth functionality needs a UI overhaul with control options like allowing “which devices to connect automatically” or “manually”. There should be option to manually search for Bluetooth devices.
  • Bluetooth device to device connection works fine but it crashes sometimes when connected to a car entertainment system.

In a Nutshell:

Build 14393.321 is one of the best Windows 10 Mobile Build ever. It comes with many fixes and improvements, even for the less-known bugs / issues. It is rock solid as a daily driver.

We also want to make it clear that it is our hands-on experience with the build and your experience may vary and may be better or worse than ours. We recommend hard reset, if you are facing lots of issues. You can read our guide to fix commonly known Windows 10 Mobile upgrade, installation and usability issues.

Nayan has more than 10 years of experience of covering Technology and innovations. He is a big Nokia fan and Tech disruptions aficionado. He loves to review new cool gadgets and writing about Android, iOS, Gadgets and general Technology stuff. He has been associated with other well-known Tech sites WinCentral and GadgetOx since long. He currently sports a Lumia 950 XL and Nexus 5X. Other interests include listening to Nu-Metal Hits and Kick-Boxing. Write to him at Email: [email protected]
  • Anthony Tremaine

    I agree. Been an insider since the beginning but recently switched to this build for daily use and i have 0 issues with this build. Even the Bluetooth connectivity issue they had I have not experienced and I stream with Bluetooth to my car for 2-3 hours a day. This is by far the best build since launch and I’m glad to be a part of it all. Can’t wait til Windows takes over lol. Lumia 640 here.

  • Thabiet

    Build .321 is heating up device when running any apps tested on L930 and L830
    Any way to revert to previous update?

    • infinidim

      Not found anyway yet. I do wish Microsoft would fix this and the WiFi issue that we have on the Lumia 930. . . .

    • M Rankin

      My need a hard reset maybe I installation problem.

      • Thabiet

        I done a hard reset the problem still persists

    • Anthony Tremaine

      Whenever I had problems in previous builds a hard reset always fixed most problems. I highly suggest you backup then factory reset the device after any builds you have problems with.

  • Pedro Weekes

    I agree with OP’s article as I too am experiencing 0 issues/bugs on this build. The only slight annoyance is that WA is a bit slower than before with regard to opening and closing chats and using attachments. Other than that MS has done a great done with this production build and that’s coming from a hair pulling black screen unlock bug

    • infinidim

      Agree with you on the fix of that bug but there are still quite a few especially on the Lumia 930. . .

  • infinidim

    But this version still has the WiFi and over-heating on the Lumia 930 that has been there since the “Denim” firmware update for 8.1. . .?