Originally Posted by Hadron
One confusing thing is that there are two fastboots (plus the "fast boot" option in Sense, but that's something completely different). There's fastboot mode on the phone, which is an option in the bootloader menu (boot while pressing volume down to get this). And there's the fastboot command on your computer, which you use when the phone is in fastboot mode. That will not be there unless you have set it up already - it does not come with HTC Sync - so I expect you do still have to do that (will come with the adb setup).
If your phone has come back with superSU installed it may have been rooted. Use one of the root checker apps from the Play Store to test, or install Titanium Backup (which needs root) and try to run it.
If it is rooted you may even have a custom recovery already installed. Go into recovery mode (bootloader menu then select recovery). If this gives you CWM or TWRP rather than the HTC recovery (which usually looks like a black screen with a warning triangle) you are sorted and don't need to install this.
You make the ROM backup using a custom recovery, either permanently installed or temporarily (if fastboot boot still works, as it doesn't with some hboot versions. If not then it has to be a permanent install).
Thanks, Hadron. I like the titanium idea. I backed up my rooted d-inc with it and I'll try that. I found the bootloader menu. Is that a tiny touch sensitive interface or do I navigate with the volume buttons and then hit the power button to select? I did the latter- went to recovery and hit the power button to select, but then the phone just seemed to shut down (no triangle). Not sure if I'm doing something wrong here.
Yikes! I think Titanium is working! I installed it and superSU asked for it to have permission, etc (yes, of course). Am I rooted!?! Should I use the playstore clockwork "Rom Manager"? If I'm rooted, I have two goals: 1. delete some bloat. Still, when I go to apps in Sense, there's no option to uninstall. 2. flash CM, but I'll wait for a stable mod
I'll keep playing with it. Looks like a Saturday wrecker... Hard to put down...