1. Planer's Avatar
    Hi everybody,
    Seems like this question, in different versions, has been asked many times, but I'll still try- maybe by now someone has found a solution.
    Just got a brand new Lumia 730. Comes with WP8.1 . Before I can update it to Win10M, The Upgrade Advisor says I must install an update for my current WP8.1 . However, when I try to install that using Phone Update it checks for updates, starts downloading, then at about 66-69% it stops and gives the 801881d0 error.
    I tried different wifi connections, updating time and region, soft reset, hard rest- to no avail.
    All my apps are up to date, no download is pending.
    Does anyone have a way around this?
    Has anyone at all managed to upgrade a Lumia 730 to Win10M?
    03-22-2018 01:35 PM
  2. T Moore's Avatar
    Easiest way, Use the WDRT to get the phone up to date.
    https://support.microsoft.com/en-us/...overy-tool-faq

    Then use the OTC updater to get the phone to 10.
    https://www.microsoft.com/en-us/download/details.aspx?id=56726&WT.mc_id=rss_windows_mobile

    It will fail if you do not read the OYC updater readme file that comes with it before you start.

    You will have more Win 10 updates to do after the OTC updater
    Planer likes this.
    03-22-2018 02:16 PM
  3. Planer's Avatar
    Well, after researching this everywhere, finally an answer. Thank you very much.
    WDRT indeed updated the phone, and now Upgrade Advisor says I can do the upgrade to Win10M.
    The question is now, what are the considerations for doing the upgrade OTC vs. OTA? I'll be grateful for any information.
    03-23-2018 03:13 PM
  4. T Moore's Avatar
    Because you wouldn't have needed the UA for the OTC updater. The download is the same , to the PC or to the phone.
    Important thing, you start out with a clean phone to update, either way
    fyi, if you use the OTC, when it tells you it is through the phone is installing the update which is not apparent. All the 10 apps have to be installed when that is through. You can't see that unless you go to the store.
    Then you have two more updates to do either way.
    Planer likes this.
    03-24-2018 12:53 PM
  5. Planer's Avatar
    Thanks so much for your quick and accurate advice. Everything worked exactly as you said it would.
    03-25-2018 11:59 PM

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