Hi,
I have the comments:
You have C65 model and flash it with C6V firmware 15 language 5 (model C6V it is Vodafone branding Siemens C65).
My oppinion is to use C65 firmware (ex.25) and after try to unlock with papua (you use "x65PapuaUtilsV079", try with "x65PapuaSoft0.9.6").