The Green Robot gets outdated from time to time, so you should keep an eye on firmware updates issued by your smartphone's manufacturer.
To update the firmware on your phone, open settings, then select "About this phone" and "Software update". You will be notified if there are new updates for your phone's firmware (if not, check back in a month or so). Download the updated firmware and follow the on-screen instructions to install it. Your smartphone will most likely reboot to finish the installation.
And do not press anything until the procedure ends. Happy upgrading!
Want to see it in action? Here's our super short video tutorial.
See this video at our youtube channel.
To further expand your Androind experience, check out our Android Software installation guide.