It will remove all the data ,contacts and apps that you installed
At the beginning switch off the cell phone by holding the Power rocker for a short while
In the next step press and hold Volume Down + Power button at the sime time for a couple of seconds.
When you see the three Android images, then release held keys.
Then press Volume Down to select option "Factory reset", and press Power button to confirm.
Good job! The hard reset has just been performed.
If the display is off, press the Power button to turn it back on.
Then from Main Menu go to Settings and tap SD & phone storage.
In the next step choose Factory data reset.
Afterwards choose Reset phone and select Erase all data.
Tap OK to confirm your choice.
HTC Hero S Restore Factory Hard Reset Format Phone.So lets start the HTC Hero S Restore Factory, HTC Hero S Hard Reset.Turn Off the mobile phone for few mints.HTC Hero S 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.