i wrote my experieznces with semctool but with the new forum i thi,k it's deleted ( not seen it) :
this is what i wrote at 2006-12-10
Sorry this is a babel fish translation from french
What you need: a cable service (TMS or cruiser), a telephonne in operating state (if it is already broken down see another solution)
First of all thank you with gotsemc which was used to me as net bus without him I will not have dared all these tests!
These some lines suppose that you know already what is a cid 49, how to see with a software if your such is brown or red and how with the joystick and any star you look at the software infos.
First of all if you have a cid 49 brown: stop do not go you further have there is very little choice;
- benefit from the offer from gotsemc and outward journey to be repair and flasher the eeprom flash zone (the term of eeprom is diverting but it is well that): such becomes red 46 and there you can the flasher with a firmware of your choice and to finalize however it it marks you 1E0W what will prevent you from updating it directly on SEupdate.
- If you do not have gotsemc it is necessary for you to pay or see someone which has a setool 3 to return it red. - Especially if it is not put red by a software pro do not touch it!!!!!!!!!!!!
Good now that one has such K750 cid 49 red in operating state one can do what one wants or almost:
CAUTION: In spite of what is written SEMCtool_v8.4_free is not compatible with K750_R1DB001_MAIN_EU_1_CL_RED49.mbn if you to use unlock or other with this firmware the telephone will be dead (it will be necessary for you to pay for the reparer).
1/with SEMCtool_v8.4_free you go initially flasher the MAIN and to only touch him with nothing other, the flasher with "K750_R1BC002_MAIN_EU_EMEA_CID49.mbn" (I took on topsony K750_R1BC002_MAIN_EU_EMEA_CID49.bin and I changed the extension).
2/Un time this MAIN flashed such always functions to suit you to gdfs and you notch edit half-value layer: you register HALF-VALUE LAYER followed of the figures and not the figures alone example me I put CDA102337/6;
you notch edit 1E0W and you leave vacuum the box,
you notch edit revision and you put the revision me I put R5A then C selected job.
3 / After that once that all is successfull you go to unlock notch "clear sp locks" then C selected job and once that all is successfull you can is reflash the MAIN which you had before either if you want the last firmware to put to you on SE update and miracle it goes.
Read attentively, you do not press.
Notice if your such were updatable by SE and that you want just the unlock jump the stage number
2.
I personally tested what is written above.