Hardware Test Mode in HTC U Play - Function Test Menu

How to open test mode in HTC U Play? How to enter teset menu in HTC U Play? How to open Function Test Mode in HTC U Play? How to enter HTC Function Test Mode? Function test is good for troubleshooting. From the HTC Function Test you may perform the following operation: Audio Test, Bluetooth Test, Charger Test, G-Senor Test, LED Test, Line Drawing Test, Camera Test, Wifi Test, Backlight Test, Button Test, Flashlight Test, Headset Test, Light-Sensor Test, P-Sensor Test, Vibrator Test etc. More Info: http://www.hardreset.info/devices/htc/htc-u-play/hardreset/first-method/