Reflash it in bootrom mode (using "2+5" instead "C"). But it will be locked back on the network.
Connect your phone in XS++3.1 and when it asks if you want to upgrade to CID52, click "YES". Then reflash with :
K800_R8BF003_MAIN_GENERIC_WI_RED52
K800_R8BF003_FS_EUROPE_2_RED52 and as a custom file
HB1-06_Generic_CDA102568_11_R4A_GENERIC_EUROPE_2 . Finally, you can unlock it, using this tutorial:
http://www.topsony.com/forum/unlocki...html#post57483
Read B. How to apply the generated patches to DB2020 CID52 phones





