Unlocking a DB2020 (with KKclient)

[seawit]

Added patch unlock for db2020: W850(i), K800(i), K790(i), K610(i), K618(i), V630(i), W710(i), W710(c), Z710(i), Z710(c), Z610(i) CID 49 and 51

Unlock works only with cable/box RS232 like Cruiser 4 in 1 or a USB Smart 4 in 1. Before unlock please check if phone's battery is charged at least in 50%.



Procedure of unlock DB2020 CID49, 51:

1. Open KKClient v1.54, it will create directory "SLF_FILES"
2. Download SFL files from http://gsminfo.home.pl/_ftp/guar/Data/SFL_Files.zip and unpack into directory "SFL_Files"
3. Files must be in "SFL_Files" directory like for example X:\path_to_KKClient\SFL_Files\*.sfl where x: is your hard drive letter
4. Now KKClient is ready to work. Before unlock of each phone i strongly recommend to check if unlock of certain phone's firmware is possible or not ( for now it works only with USB cable )
5. If application tells you that your phone's firmware is supported please change cable into RS232 in menu, press SETTINGS and then press DETECT, wait few seconds and select COM port and kind of cable/box, then set speed (i recommend 921600), select option "use RS232 communication" and press ACCEPT.
6. If you unlock it for the first time please check if phone communicates by RS232 - press "READ INFO" and connect phone. If you do not have Autoignition cable press shortly POWER button in phone for ignition.
7. If everything goes without a problem you have to choose option "Simlock CID49, 51" and press button "FLASH PHONE".
8. Wait until program finishes - it can take around 50 seconds.



FAQ:

What should you do in case of errors ?

This method of unlocking requires few tricks and it may look like killing a phone. Do not worry - if you see any error please disconnect phone, remove and insert batter and check if phone powers on. If phone does not power on you have to flash phone only with main file (with the same firmware version, which was in the phone) and everything will be ok.

Phone's firmware version was not supported, but I tried to unlock it.

In this situation phone will be like 'dead', because there is no recovery file. You must flash phone only with main file and then everything will be ok, but it will need 1 credit. Because of it i recommend to always check before unlock if certain firmware is supported or not.



Additional info:
If you have a CID49 (and possibly CID51) phone, you can easily flash the main for free using XS++ once you have located the right main firmware file for the phone you have. But do not flash the filesytem.


Disclaimer:
Please be aware that this guide is supplied "as-it-is" and neither me or Mobization can be held responsible for anything that can be resulting on a phone malfunction due to its misuse. If you aren't used to or familiarized with this kind of procedures, it would be best to take yours to a professional.