It will remove all the data ,contacts and apps that you installed

HTC HD Mini PB92100 Hard Reset
Performing a factory reset using phone buttons:
With your phone powered off, press and hold the VOLUME UP and VOLUME DOWN buttons
While holding the volume buttons, press the POWER button briefly and then release it
When you see a warning message on the screen, release the VOLUME UP and VOLUME DOWN buttons
Press the VOLUME UP button to perform the reset, or press any other button to cancel the reset
HTC HD Mini PB92100 Restore Factory Hard Reset Format Phone.So lets start the HTC HD Mini PB92100 Restore Factory, HTC HD Mini PB92100 Hard Reset.Turn Off the mobile phone for few mints.HTC HD Mini PB92100 Remove Pattern Lock.
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Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.
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