If you are an owner of the sexy HTC Diamond, there is one thing that will annoy you the most especially if you are coming from some other Windows Mobile device: the device won’t wake up when an SMS comes in.
Just make the following changes in the registry of the HTC Diamond. You can use any of the registry editor.
Go to HKLMDriversBuiltInRIL > find the DisableSMSWakeUpEvent > Change value to 0 > Soft Reset.
Some popular registry editors are “Resco registry”. It comes with Resco File explorer. You can also use PHM Registry Editor to perform the same action but the developer of PHM registry editor is no longer offering the application on his website.