Originally Posted by OtaruM
Can someone confirm is it really necessary to flash new HBOOT
versions (1.20 and later) for ICS to work? ADSP, kernel and radio related stuff are obviously needed but hboot..., really?
I've seen that some folks flashed old hboot versions (like 1.17 eng hboot) and ICS worked anyway.
SO, the real question is why in such case new hboot is present in ICS firmware? A lot of people after flashing new ICS-required firmware went nuts with problems like *LOCKED* and S-ON cases and even brick. Also fastboot commands are lost.
Hboot 1.23 is required for the first 4.0.3 leak, many people have tried to boot the first leak of 4.0.3 rom on older Hboot, and were greeted with continual boot loops. On the 4.0.1 leaks, there were no such requirements. But with Hboot 1.2x and above you'll lose advanced fastboot commands, such as flashing .img files because the new ones haven't been hacked to get advanced flashing commands back.
Tl;Dr, you *need* Hboot 1.23 to run the first leaked 4.0.3 rom, and you *need* Hboot 1.27 to run the new sense 3.6 rom.
Sent from my HTC Sensation
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