jagadeesh: This is not working for DB2020 phones. You'll definitely kill the phone if you write another GDFS without having a backup of your old one. The DB2020 GDFS in the download area are stored there for a different purpose. If you have a backup of the security units of your GDFS, you can flash a GDFS from another phone and overwrite a few blocks that are needed. But if these blocks have already been damaged in your old GDFS the phone is nothing more but a brick. You need a SETool3Box also for this procedure.