akazabam, quick question:
I'm rooted and I have HBOOT 2.02, Build #3.30.651.3, baseband 2.15.009.01, and I am thinking about flasshing Fresh 3.5. I see from the link to the roms at xda, that Fresh is based on 3.70...so, I think the process is to flash the combo to the 3.70, then the Fresh Rom, after making a nandroid, of course. Do I have this right?
Then, however, will my nandroid be useless after running the later versions of radio and software? I suspect that that will revert to the 3.30 when restoring the nandroid, but not sure.
Sorry, this stuff can get very confusing, as the Hero seemed to be much easier to root and rom. Thanks!
Here's the order I went in, and what I would recommend:
1) Make a nandroid backup (always start with this, since you know your phone works now.
2) Flash Fresh or any ROM based on 3.70. Follow the normal flashing process, of course (wipe data/cache/dalvik - the usual)
3) In the same recovery session, flash the combo radio update. The reason I say this is because:
a) If you currently have a 3.30 or under based rom, and a stock HTC kernel, if you flash the radios first, then try to boot up, you'll end up in a bootloop. The only way that combination will work is if you flash a different kernel (anything not stock HTC, like netarchy). Also, you'd need to keep your PRI at 1.77.
b) If you flash the rom first, then boot up, it will probably work, but you could have some instability. Some people choose to do this, but a lot of people do this without understanding the complications.
4) Once you've flashed those two things, you can go ahead and boot up. Make sure the phone stays stable, and everything works. As long as it does, make another nandroid backup at this point.
5) Should you want to go back to a 3.30 ROM, you cannot simply nandroid restore. Nandroid backups do not include radios. It's the same with ROMs - almost none of them include radio updates (though a few do here and there). Anyway, the proper procedure for restoring would be to restore your nandroid backup, then do one of the following:
a) Flash a custom kernel in the same recovery session, or you won't be able to boot up, then downgrade at least your PRI to 1.77.
b) Downgrade your radios back to the previous versions and boot back up.
Sorry if that was more information than you need, but hopefully I answered your questions.
EDIT: Just to make things clear, your nandroid backups are never useless unless you:
1) Switch phones
2) Switch recovery (RA to CW or CW to RA)
3)
Upgrade hboot
If you follow the above steps, you will not upgrade hboot. Some people think it's fine to unroot, accept the OTA, then reroot, but I will never recommend a method that involves changing your hboot version.
