How to update software

                                       

Your phone notifies you when an update is available for you. You can also check for updates by going to Settings > Phone Update and tapping Check for updates. You can install the update immediately, or postpone the update to a more convenient time. See below instructions how to prepare your phone and more detailed installation instructions.
We're working to make Windows 10 Upgrade available to eligible Lumia smartphones running Windows Phone 8.1. In order to prepare your phone for Windows 10, you will need to have Lumia Denim (OS version 8.10.14219.341, or higher) installed.  You can use the Windows 10 Upgrade Advisor app to check the Windows 10 Upgrade eligibility for your phone and to clear up space for the installation. If your phone is eligible, you will see Enable Windows 10 Upgrade option in the app, which you need select to receive the Upgrade.

• To see your current firmware and OS versions, go to Settings > about > more information.

• To see your current software release, go to Settings > extras + info.

Before installationCharge your phone. Before starting the update, connect to a charger or make sure your phone has enough battery power (at least 50%).
Be online. Your phone supports wireless Over the Air (OTA) updates and there is no need for cables or a computer; you can simply download and install the update using your phone.

• Use a Wi-Fi network to download the update and avoid mobile data transmission costs.

• Offline update is not possible.

Enable backups. Make sure your settings, apps, photos, and text messages remain safe and sound.

• The backup process is automatic, and it can be found under Settings > backup.

• On this screen you will find separate options for backing up you apps+settings, text messages and photos+videos

Make some room. Great stuff comes in big packages! Before starting a software update, we recommend that you make enough space on your phone.

• You may need to have up to 1.5GB free phone memory to ensure that the software update goes smoothly.

• If you don’t have enough free space in your phone memory, you may be able to update the phone using a memory card. This is available for some of the phones running Lumia Denim (OS version 8.10.14219.341, or newer). 

• To check the available free space, go to Settings > storage sense. You can find more detailed instructions on how to clear up space on your phone from the Software update FAQs-section.

Check the Windows 10 Upgrade availability. Download the Windows 10 Upgrade Advisor app from the Windows Store to check the upgrade eligibility for your phone. This app will also help to clear up space for the installation. If your phone is eligible, you will see Enable Windows 10 Upgrade option in the app, which you need select to receive the Windows 10 Upgrade.
2. Steps during installationTo view and to install the updates, tap the notification message, and follow the instructions shown on your phone. You can also check for updates by going to Settings > phone update and tapping Check for updates.  You can install the update immediately, or postpone the update to a more convenient time.

• The update should take around 15-30 minutes, but a major update could take up to 2 hours to complete depending on your phone model and the number of apps you’ve got installed.

• You are not able to use your phone during the update installation.

• Follow all the update prompts, and do not worry if your phone restarts several times during the process, that is completely normal.

• You can also schedule to install downloaded software updates later from Settings > Phone Update > Preferred install time.This is available on phones running Lumia Denim (OS version 8.10.14219.341, or newer).

3. After installationMake sure you have the latest apps. After your phone is upgraded to Windows 10, additional app updates from the Store could be needed to fully enable new features and improvements for your phone. If allowed by your settings, app updates should happen automatically when your phone is connected to a charger and Wi-Fi.

• To check for app updates, go to Store > Menu > Downloads and updates and tap Check for updates. After the update check is complete, tap Update all.

• To enable automatic app updates, go to Store > Menu > Settings > App updates > Update apps automatically when I'm on Wi-Fi and tap On.

Keep your phone updated. Windows 10 is updated continuously, so make sure you follow all the update notifications that appear on your phone.  By keeping your phone updated with the latest software you can get fresh new features and improvements, and resolve many issues.