I did this, but I used my old GDFS backup (when the phone worked), and if I try to start it up, it does the same, flashing white screen and if I connect it again to SETool after starting it up it's again detected as K700.
Whats wrong? :(

Code:
1. Backup the corrupted GDFS. (Read GDFS)
2. Create a .TXT file with the follwing contents:

 gdfsread:00020e5a
 gdfsread:00020e48
 gdfsread:00010851
 gdfsread:00000006
 gdfsread:0000000E
 gdfsread:00000013
 gdfsread:0000001C
 gdfsread:00000018
 gdfsread:000000AA
 
3. Save it, name it "readsecunits.TXT".
4. Select the file in SETool's "MISC" field and press "Write SCRIPT".
5. Apply the GDFS from a working DB2020 phone of the same model.
6. Write back the original units. Apply the "secunitsbackup.TXT". (Write SCRIPT)