HTC Merge User Manual page 45

Mobile Broadband Connect
When you do not have Internet connection on your computer, you
can select this mode to share your phone's mobile data connection
with your computer. For more information, see "Using Your Phone as a
Modem" in the Internet chapter.
Media sync
Select this mode if you want to synchronize pictures, music, and
videos with your computer. You must install V CAST™ Media Manager
on both your phone and computer before you can synchronize media.
To learn more about V CAST™ Media Manager, go to
http://phones.verizonwireless.com/mediamanager/.
If you do not want to show the Connect to PC dialog box everytime
you connect the phone to the computer, select the Don't ask
me again checkbox in the Connect to PC dialog box. The default
connection type will be used when you connect the phone to the
computer.
To check or change the default connection type and to show or hide
the Connect to PC dialog box, press HOME
Settings > Connect to PC.
Basics 
> MENU, and then tap