This is a volume tweak for the deaf iPod generation. After this I think you'll find the Mogul has one bad ass speaker
Before you modify anything, make sure you jot down or backup your registry settings because this will radically alter you phone's volume...
Go to HKEY_CURRENT_USER/ControlPanel/SoundCategories/Attenuation
Here you'll notice three categories: 0,1,2 and depending on your phone's ROM 3 different values for each one. Look at category #1's value. Change categories 0 and 2 to the same value as category 1.
Next go to HKEY_CURRENT_USER/ControlPanel/SoundCategories/Feedback
Set InitVol to 5
Exit registry editor and wait a minute or two for the settings to take effect. Call your phone to hear the ringtone or play an mp3
Btw one of the Mogul's excellent features is that whenever you are in an application that uses sound, you can use the scroll wheel to lower or highten the volume. For example when in a call, if you find the ear speaker not loud enough, just scroll up.