How do i restore samsung x10 to factory settings?

Soft Reset<br /> <ol> <li>Turn off the device.</li> <li>Remove and reinsert battery.</li> <li>Turn on the device.<br /></li></ol>Hard Reset<br /> <ol> <li>Unlock the screen then press and hold the <b>Power</b> button for two seconds. Select the <b>Power off</b> option. If the phone won't turn off, pull and replace the battery.<br /></li> <li>Hold the <b>Left</b> and <b>Right</b> buttons located under the display.<br /></li> <li>Press and release the <b>Power</b> button while continuing to hold the <b>Left</b> and <b>Right</b> buttons until instructions appear.<br /></li> <li>Follow the instructions on the screen.<br /></li></ol>or<br /> <ol> <li>From the Home screen press <b>Menu</b> and select <b>Settings</b>, or tap the application slider and select <b>Settings</b>.</li> <li>Select <b>Privacy</b>.</li> <li>Tap <b>Factory data reset</b>.</li> <li>Select <b>Reset phone</b>.</li> <li>Select <b>Yes</b> to confirm the hard reset.</li> <li>The Sony Ericsson Xperia X10 will then go through the process of formatting the memory.</li> <li>Wait for it to restart and factory default settings will be restored.</li></ol>or<br /> <ol> <li><a href="http://www.sonyericsson.com/cws/support/softwaredownloads/detailed/pcsuite/aino?cc=gb&lc=en">Download and install PC Suite</a><b>.</b></li> <li>From the PC Suite software, select <b>Tools</b>.</li> <li>Select <b>Phone Repair</b>.</li> <li>Select <b>Continue</b>.</li> <li>Wait for the download to complete.</li> <li>Press and hold the <b>Back</b> button while plugging the phone into the computer via the USB cable.</li> <li>The phone will be flashed with the software and complete the hard reset.</li></ol>