How to access the hidden menu of the HTC One M8, even this device like many Android devices have a hidden menu. The menu is used by employees HTC for more information about the device and to find any possible hardware errors or problems your phone may have. While the hidden menu of the HTC One M8 is intended for use by technicians of the HTC, anyone can access.
This menu, also called the service menu, can be accessed via a code.
What can I try with the hidden menu of the HTC One M8? Allows you to test a variety of things like display colors (red, blue and green), receiver, vibration, dimming, sensor, touch, sleep, speaker, sub key, front camera, LED, IR LED, low frequency , Barcode Test, Sensorhub) etc.
How to access the hidden menu of the HTC One M8: The hidden menu of the HTC One M8 can be accessed from the dialer app. Open the dialer application and dial the following number:*#*#3424 #*#*. From here you can directly access all options.