You can check the software version of your mobile phone. If you don't have the newest software version, you can update your mobile phone's software.
View software version
Slide two fingers down the display starting from the top edge of your mobile phone.
Return to the home screen
Tap Software information.
Your mobile phone's software version is displayed below Android version.
Tap the home icon to return to the home screen.
*Please refer to the HTC website for more information or further support.*