When HTC s900 receives the short message, if it is not opened for reading, the mobile phone keeps shaking. What happened? How to set it to ring?

If you keep vibrating, press the hang-up key to turn off the vibration. It's the same as setting the bell. If the ringtone is very long and there is no operation after receiving the text message, it will ring until the end of the ringtone. If the customized ringtone can put the file in my document directory, otherwise it can't be set. Set the ringtone, click Start-Settings-Sound and Notification to drop down in the event, and there will be various events to choose from. Select information: New.