In order to hard reset a HP iPAQ Data Messenger, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
HP iPAQ Data Messenger device will be brought back to the default configuration of a brand new device.
1. Power down the device.
2. Hold down the Answer/Send button, Power button and End button.
3. Your device should now reset and reboot. Done!