...download from http://rapidshare.com/files/44149250/Service_cable.rar .
Inside you have DCA500 cable schematic and flashing/unlocking software Joker. Download from http://eh.student.utwente.nl/~landy/index.php?dir=Repair_FuBu/
user: mobile
password: elibom
"SL56_repair_fullflash.rar"
Construct your cable (you need 4 wires) or buy C55 serial cable, conect this cable between PC and phone, open Joker,set "Type" SL55/SL56, click on "TP" and find in the picture which testpoint connect to the ground. Connect testpoint to the ground (phone need to be off), click on the "Service" -> Service mode, phush shortly red button from your phone (if your cable don't have the autoignition) and read on the Joker display (right window) if your phone enter in Service mode. Disconect TP from the ground, click "Flash" tab -> check Fullflash and verify if is checked "Protect Bootcore" (is verry important !!!) -> click on Write. Read on the Joker display (read window) if the flashing is started and wait. After flashing is finalised, go to "Service" and click on Phone off. Connect testpoint to the ground (again), go to the "Service" -> Service Mode, push shortly the red button from your phone (if you don't have cable with autoignition), disconect TP from the ground, click on "Read + Calc Keys". If on the right window see " Status: Factory Mode", your phone is unlocked. Click on "Phone off", close program and disconect cable. For more details search on this forum.
That is!
Br,
dagos