First download XS++
then Backing up GDFS
XS++ 3.1 Guide-Flashing, Customizing, Recovering - Top Sony Forums
then download firmware R8BF003
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its avilable in download section , for getting download access -> u should have
minimum 10 post then request for download access
How to get access to Download Area? - Top Sony Forums
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Flash the firmware
XS++ 3.1 Guide-Flashing, Customizing, Recovering - Top Sony Forums
then download vkp patches
Top Sony Forums - View Single Post - Patches For All DB2020 CID52 Phones
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How To Create A Vkp File Out Of These Patches:
1. Open Notepad
2. Paste The Contents Of The Patch In Notepad
3. Click File And Hit "Save As"
4. Change File Type To All Files
5. Clear Fields Of File Name (even *.txt)
6. Now Type <Any Name>.vkp (eg. Megabass.vkp)
7. Press Save.
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apply patches
Flash your phone and How to apply or remove patch using SETool 2 Lite - Top Sony Forums