Use your phone or computer to check, download, and install phone software updates:
• Using your phone:
If your phone notifies you about an update, follow the instructions to download and install it.
To manually check for updates, tap Apps > Settings > About phone > System updates.
Your phone downloads updates over your Wi-Fi connection (if available) or mobile network. We recommend that you download updates over a Wi-Fi connection. Remember, these updates can be quite large (25MB or more) and may not be available in all countries. If the mobile network updates are not available in your country, update using a computer.
• Using your computer:
On your computer, go to www.motorola.com/update.
Source: user manual