There are two different ways to get Windows 10 Mobile:
Buy one of the select new devices running Windows 10 Mobile that are available now.
If the upgrade is available for your existing Windows Phone 8.1 device, you can install the upgrade when available. We're working with phone manufacturers and mobile operators to make Windows 10 Mobile available to supported Windows Phone 8.1 devices as an update.
To check if the upgrade is available for your phone and install the upgrade, go to the Store, install the Upgrade Advisor app, run the app to see if the update is available, and then select Enable Windows 10 upgrade.
The availability of Windows 10 Mobile as an upgrade for existing Windows Phone 8.1 devices will vary by device manufacturer, device model, country or region, mobile operator or service provider, hardware limitations, and other factors.
For a list of eligible phones and important info about the upgrade and Windows 10 Mobile, go to the Windows 10 Mobile specifications page.
Watch a short video about how to use the app to upgrade to Windows 10 Mobile. For more info about the app, see Upgrade Advisor app for Windows 10 Mobile.
Because of the size of the update, a Wi‑Fi Internet connection is required for download and installation.
If the update to Windows 10 Mobile is available for your Windows Phone 8.1 device, here are some things to keep in mind before you start:
Plug your phone into a charger to make sure it doesn't run out of battery during the upgrade.
Connect your phone to a Wi‑Fi network. Because of the size of the update, a Wi‑Fi connection is required for download and installation.
Free up enough storage space to download and install the update. You can use the Upgrade Advisor app and it will recommend files, such as videos or photos, that you can move to OneDrive or an SD card, if you have one installed. You can also connect your phone to a PC and move your files there. After the upgrade, you can move files back to your phone if there's enough space.
If you remove apps from your phone, you can reinstall them from the Store after the upgrade if there's enough space. Deleting an app will erase app data, such as saved progress in a game.
Depending on the model of your Windows Phone 8.1 device and the number of apps installed, the upgrade might take an hour or more to complete. You won’t be able to use your phone during the installation and it will restart a few times.
After the upgrade to Windows 10 Mobile is done, some additional time might be necessary to finish migrating data and apps. If some app tiles don’t appear active or you’re not able to open them, keep your phone plugged in a charger and connected to Wi‑Fi, and wait for these apps to finish updating. If an app tile is missing from Start, check the App list for the app and pin it to Start, or go to the Store and see if a new version of the app is available.
After you install Windows 10 Mobile, your device is set up to automatically download and install updates when they become available.
To check for updates for your phone manually:
Select Check for updates to see if any updates are available. To change update settings, select Advanced options.
Windows 10 Mobile Enterprise customers will be able to postpone updates.
Additional requirements will apply over time for updates, and update availability may vary by device manufacturer, device model, country or region, mobile operator or service provider, hardware limitations, and other factors.
The best way to know if the upgrade to Windows 10 Mobile is available for your phone is to install and run the Upgrade Advisor app.
If the upgrade is available for your phone and you used the Upgrade Advisor app to enable the upgrade, but you're having problems downloading or installing it, wait a few minutes and then try again later. When installing the update, it's a good idea to make sure your battery is fully charged (or plug in your phone), use a Wi‑Fi connection instead of a cellular data connection, and free up space by removing files you no longer need.
For more info about error codes you might see during updates, see Get help with Windows 10 Mobile update errors.
If you upgraded your Windows Phone 8.1 device to Windows 10 Mobile, you can use the Windows Device Recovery Tool to rollback to a previous version. For more info about this tool, see Windows Device Recovery Tool: FAQ.
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