How to Update Lumia Cyan Update

How can I update my Nokia Lumia with Windows Phone 8?

Before starting the Lumia Cyan update, we recommend that you make enough space on your phone. Having about 1.5GB free phone memory will ensure that your software update goes smoothly.

 To check for available free space, go to Settings > storage check (storage sense). 

In the below Software Update FAQs you can find detailed instructions on how to clear up some space on your phone and other tips to help you, for example if you encounter an update error.

The Lumia Cyan update with Windows Phone 8.1 consists of two parts, and after the first update your phone will automatically check for updates again. Follow all the update prompts so that you don’t miss out on any of the goodies.

Here You Can find the Steps for Updating Your Phone software smoothly 

Step 1. Your phone notifies you when an update is available for you. You can also check for updates, just tap Settings > Phone Update.

Tip! Use a Wi-Fi network to download the update and avoid mobile data transmission costs. Before starting the update, connect to a charger or make sure your phone has enough battery power (at least 50%). You might also need to make enough space on your phone for the update (1.5GB free phone memory is recommended). To check for available free space, go to Settings > storage check (storage sense).

Step 2. To view and to install the updates, tap the notification message, and follow the instructions shown on your phone. You can install the update immediately, or postpone the update to a more convenient time.

Step 3. 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. 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.

Additional app updates from the Store could be needed to fully enable new features for your phone. You will get the app update notification on the Store app shortly after the software update

Windows Phone 8 compatible phone models

Nokia Lumia 520, 520T, 521, 525, 526, 620, 625, 630, 630 Dual SIM, 635, 720, 720T, 810, 820, 822, 920, 920T, 925, 925T, 928, 930, Icon, 1020, 1320 and 1520.

Watch video to how to Update your software 

Nokia Lumia

Source : http://www.nokia.com/global/support/software-update/wp8-software-update/