to reset i5500 it's no so sample
-first u need to download adb (android debug bridge)MEGAUPLOAD - The leading online storage and file delivery service
-then copy the two files in to windows\system32
-power on the phone the phone and setup the drivers
-open cmd and type "adb reboot recovery"
-the phone will reboot and enter in recovery
-select wipe data adn then reboot