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Sd card change cid2/5/2024 ![]() Use volume and power to start the process. Boot back into Fastboot.ġ4) You should be prompted to install the RUU. Save the updated disk imageĭd if=/sdcard/sdf1.img of=/dev/block/sdf1ġ1) Boot into download mode and verify your updated CID by running:-ġ2) Prepare an SD card with the RUU in the root of the card, renamed as 2Q4DIMG.zip.ġ3) Power off phone & insert SD card. ![]() You'll need:-ģ) Boot into download mode, connect your phone via USB and run (just for reference):-įastboot flash recovery twrp-3.2.1-2-ocm.imgĦ) Select Advanced -> Terminal and enter:-ĭd if=/dev/block/sdf1 of=/sdcard/sdf1.imgĨ) Open the image in HxD and locate HTC_621. Sorry I forgot to post full instructions - here they are:-ġ) Download all the relevant files. There are many things in the extracted image, maybe some encrypted data is hidden inside. I noticed that there is also a cid in sde1, but modifying it does not make me to pass the checking of HTC.Īfter I failed on flashing the other RUU pack, I restore cid, mid and version number, and I pass the checking this time, so I don't think modifying them will cause trouble. The flash it back to the sdf1 partition byįor changing version number to downgrade, here is the link: The flash it back to the sdf2 partition byĢ.Open the image file by text editor, find the cid of your phone. I hope people who are familiar with these can find things that I didn’t notice.Ģ.Open the image file by hex editor, find the mid of your phone. ![]() The following is the method of modification. It seems that HTC has some cryptographic verifications for this, so I cannot modify everything. I successfully done this today, but I encountered some problems while flashing the RUU pack. After the last time I successfully downgraded by modifying /dev/sde1, I tried to modify cid and mid in the same way.
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