If you installed more than one SMS app on your phone, you can set which app will send and receive SMS. 
	 
  
  
- Go to .
- Tap  or . 
- Select your preferred messaging app. 
	 
Tip: To set HTC's app as the default, tap 
		Messages. The 
		Messages app can send and receive both SMS and MMS and allows Group Messaging (if the device and your mobile operator support it).