How can I update my Nokia Lumia with Windows Phone 8?
Software
updates from Nokia and Microsoft are safe to install, and your
settings, apps, photos, and text messages remain safe and sound.
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! Connect
to a Wi-Fi network to download the update package. Before starting the
update, make sure your phone has enough battery power (at least 50%), or
connect to a charger. You might also need to make enough space on your
phone for the update. To check for available free space, go to Settings > Storage check (1.5GB free phone memory is recommended).
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 it could take up to 60
minutes. You are not able to use your phone during the update
installation. Don’t worry if your phone restarts several times during
the process, that’s 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.