Unlocking description for Siemens 65 (>36 firmware), 70 and 75 series with no testpoint!
The EASIEST & SAFE way:
1. Connect your phone using DCA-500 or DCA-510 cable (DCA-540 is not supported!).
2. Put px65v4 to your phone using MPM, SiMoCo or something similar (Java/Jam/Applications/px65v4).
3. Run px65v4 (Menu -> Surf & fun -> Applications -> px65v4).
4. "Local connection?" - choose "For session" and OK.
5. "Allow Java to access data cable?" - Yes.
6. Wait for displaying codes.
7. When the codes are shown, don't close the application and run Papua.
8. Choose correct COM in Установки.
9. Go to the Коды.
10. Push Px65v4. Papua should read IMEI, ESN and HASH.
11. Click Расчет SKEY и BootKEY - Papua will calculate SKEY and BOOTKEY.
12. In the phone close the application and go to the main screen. Don't turn off the phone!
13. Enter correct HWID (if you don't know what is your phone HWID, you can read it from the list near the HWID field).
14. Click Ввести SKEY в телефон. Papua will write SKEY to the phone.
15. After SKEY writting, click Freia.log.
16. DON'T SAVE *.log file! You must choose CANCEL.
17. Confirm next question (choose Yes).
18. Turn off and turn on your mobile. Simlock shouldn't exist.
Regards from Poland
Source with pictures (in Polish): http://www.siemensiak.pl/artykuly,simlock,w,siemensach,serii,65,powyzej,v36,oraz,serii,70,i,75.html