Well, Just for UNLOCK, you can use the "Java Midlet" method - then calc. SKEY + BKEY from HASH & ESN , Send SKEY to phone -boot in Service mode, then with "Freia.log" button when offered to save the log press 'Cancel' to be offered to 'write blocks directly on phone'.
This works always, since it uses BFC commands...
It appears that there is a difference for C72 compared to other models...
What I had incorporated in 079g English , for the "Flash" page or TP booting, is the support of the Amd/Spansion 0001/227E flash regarding the correct Reading of OTP IMEI and also correct calculation of ESN !
I can guarantee that these are correct !
But it appears that there are other differences, at least for this model, when working in "Flash" page, That I don't know... And I don't have a C72 for tests...
So it is better not to use the functions of "Flash" page with that model ...
and that version of PapuaUtils (079g Eng.)
Except for getting IMEI, HASH & ESN with TP booting (Only 'pause' checked) ... And probably Save EEP blocks or Reading FullFlash...