I receive this error message when trying to unock my c510....
Although, I have not yet had success with debranding either.

When I insert the custum_upgrade.xml, and turn the phone on, it appears to
install but the "please wait" download bar does not move... don't know if thats a problem. And when I attempt to use the sony update software, it wont allow me to flash because It says I already have the lastest software... any suggestions?


Code:
Action journal
14:34:08   Instructions
14:34:08   Please connect the phone via USB while holding 2-5…
14:34:08 . The action name is 'Unlock'
14:34:08 . The action started waiting for the user
14:34:48 . The action finished waiting for the user
14:34:48   Connecting via SEMC USB Flash Device (USB1) (ver. 2.2.0.5)
14:34:48   Connecting to the baseband...
14:34:48   Entering service mode...
14:34:49   Detected chipset: DB3210 P1A/P1B
14:34:49   Boot-ed via: EROM
14:34:49   EROM version: 1200-4341 SEMCBOOT R6A019
14:34:49 e This boot mode is not supported
14:34:49 w You must boot via ROM
14:34:49 e Failed!
14:34:49 . The action reported failure

Error code
# 536910AF005BDA74

Error details
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20 A0 4F FE A7 15 25 BA A3 DE F1 B8 8F 16 03 C3 
BB 34 E7 8F 27 C4 D5 20 5B 7C C8 D5 11 7D AD 62 
15 66 07 22 57 4C 7B 9A FD 10 FF 3B EF AC 5D 20 
E5 79 A9 4E 87 A4 CA B1 63 AC FF FA E1 6A 0D BE 
4B 8C 13 56 25 13 
---