K750i belongs to db2010 and comes with CID 36 and CID49 encryption. SE ramped up the encryption on cid49 phones, this encryption algorithm is MUCH stronger than cid36 and hasn't been cracked yet. You can't change the CID unless you can remove the encryption first. Since encryption algorithms are different from model to model, u cannot flash a CID36 phone with a CID49 firmware or vice versa... There are some ways by first removing the existing version completely and then flashing it with a higher or lower encryption, but thats beyond this tutorial.
To get to know which version of CID it is, connect with far manager. See step1
The best version of K750i firmware is R1CA021
The update later came with lower volume on headset music. I dont think you would want that.
Download
1) Download K750i Drivers here. http://www.4shared.com/file/V0xqAgyD/K750i_Drivers.html?
Copy it to a folder on desktop. Connect the phone while its switched on. When windows asks for driver, select this folder. Windows will automatically take the driver. It will ask for more drivers, again select the folder for windows to find it there.
2) K750_R1CA021_FS_EMEA_1_RED49.fbn and
3) K750_R1CA021_MAIN_RED49. For CID49 and the same files names for with RED36 or brown 36 incase of CID36 phone. Both files for CID49 are in this rar file: http://www.4shared.com/file/eqyeWk1I/Fs_and_main.html?
4) Download CDA files at this link: http://www.4shared.com/file/UAudg6uy/CDA.html?
5) Far Manager: Download: http://www.4shared.com/file/2E1P2JE0/Far20b1263x86.html?
(For those who dont know how to use Far Manager, check this out http://trivialstrife.blogspot.com/2011/06/modding-sony-ericsson-hazel-for-better.html)
PROCEDURE
1) Swich of the phone with battery charged upto minimum 50%. Then start Far Manager. Press ALT+F1. Select "just da flasher". In the upcoming menu select "db2010" or k750i from the menu. Leave everything else at its default state. Connect ur cable to the pc and press connect on the far manager menu. Press c of the phone while connecting the phone. Far manager connects to the phone. shows the version of CID. wait for it to finish and then click ok.
2) You will find folders oflash and ofs. Open oflash. Select the location on the right side of far manager where you copied K750_R1CA021_MAIN_RED49 on the desktop or anywher else on ur system. select this file and click "copy" and confirm it. Copying will take time, it replaces all blocks.. once that is done, select the location on the right side of far manager where you copied "K750_R1CA021_FS_EMEA_1_RED49.fbn". Select the file and click copy. Copying takes a little while, after all the blocks are done, it will show "flashed ok" click on "ok".
3) Now double click the "..." button on the top below "name" on the left hand side. Click "..." till FAR manager asks you confirmation on exit. click ok to confirm.
4) Now Disconnect and remove battery and replace in.. Do not switch on. Follow step 1 to connect the phone again. This time double click the folder "ofs" Then double click TPA, Preset, Custom, ie (open ofs/tpa/preset/custom). Now on the right hand side navigate to the CDA folder you downloaded. Select all files in the folder of the CDA (by right clicking) and click copy. It will copy all the files. Once you're done, double click "..." at the top. Again it will ask confirmation on exit. Click yes. You're done.
5) Disconnect. Remove battery. Reinsert. Enjoy ur flashed phone.
Hi! I really like your guide! Although I get some kind of error message when I try to access the "oflash" folder, but mine's called "bflash". Can you link me to some guide when they talk about completely removing the existing version? Because I suspect something is very wrong with my software, even when I did a master reset I get stuck in the "Choose language menu". Thanks!
ReplyDeleteHey... Actually there are 4 folders.. out of which to flash the rom, ur supposed to access oflash. And if you get an error, ur rom might be messed up. or you have connectivity issues. The port might be lose or the cable might be. Check the cable. make sure u hold everything steady or leave it on a table without letting it shake. old cables do have corroded contacts so just take a razor blade and scrape them just to make sure u have proper copper contacts. and also of ur phone. and make sure the cable doesnt have any cuts etc on it. Once you get thru, oflash will open and it will be empty. Copy the files " K750_R1CA021_MAIN_RED49" (this changes the entire core files of ur phone with new one) and "K750_R1CA021_FS_EMEA_1_RED49.fbn" (this changes the file system with new one) and CDA is the customization menu.. As i said.. This gives the phone a new software. When you get into oflash and copy the main file (Option: yeah, flash it) it removes everything from the old os on the rom. So this process is like doing a clean install, completely removes the existing version. And since sony ericsson has stopped support for it in "Update Service" we no longer have that option, though what that software does is the same as what we do manually through far manager. Oh and by the way, i really tried to get a guide for u, nothing that gives u more detail than what i hav put here. Will search more. Will post here if I find something. I read this on the sony website saying that they have stopped support for K750i on software update.
ReplyDelete"K750i software updates
03-01-2011
Software Updates are no longer available for your phone.
From March 2011 the Sony Ericsson Software Update is no longer supported by your phone. Therefore, you can no longer download new software via the Update Service or Remote Update Service."
Search on google for "K750i-far manager-tutorial" or something. Something might come up. If you have any doubts, do write in.. I'll be around.. thanks for readin.