for any kind of errors in blackberry 505 102 etc etc jvm jump start uncaught exception
or any other OS related error
here it goes
DOWNLOAD LATEST OS OF THE DEVICE YOURE HAVING AND INSTALL IT ..GO TO YOUR c/program files/common files/research in motion/ and there you shall find APP LOADER FOLDER..open it and delete vendor.xml file...after that connect your phone WITHOUT BATTERY TO YOUR APPLOADER EXE. YOUR SOFTWARE WILL SAY UNKNOWN DEVICE nothing to worry. THEN GO ON PRESSING NEXT BUTTON TILL YOU GET APPLICATION SELECTION WINDOW..SELECT THE APPLICATIONS YOU WANT AND PRESS NEXT...AS SOON AS ERASING STARTS PUSH IN YOUR FULL CHARGED BATTERY AND WAIT FOR THE PROCESS TO END......
U WILL GET YOUR BLACKBERRY FULLY FUNCTIONAL