Downgrading gingerbread to froyo on htc ispire 4g

I am just pasting an earlier post of mine from a different thread:

I did notice a slight speed increase after flashing to CyanogenMod 10.1. I overclocked mine to 1920MHz stable.

A ROM could be just what you need. Now, the only way to flash a new ROM is to root your phone, which erases everything except your sd card. If you can, make a whole-phone backup somehow. I recommend CyanogenMod 10.1, as it is the newest version, and completely stable. I will post the links asap.

CyanogenMod is well worth flashing to your Inspire.

http://forum.xda-developers.com/showthread.php?t=2073997

 

Welcome to the AndroidForums, braggerman and a little hello wavey to fellow Hoosier djyoder1 .

I've moved your thread over to the all-things-root area for you guys.

Cheers!

 

the inspire/DHD are easily downgraded with a simple main version change,and a gold card if youre downgrading to another carriers firmware. however... you do NOT want to downgrade to froyo if your inspire shipped with GB. if youre not sure,please,do not do it. there is something about the froyo hboot that really,REALLY,screws up these newer phones. recovery is difficult to impossible.

again... do not follow any guides that downgrade your phone to froyo using a whole ruu that will change your hboot.

what you can do is root,then run custom roms(froyo or GB,even ICS or JB based) that utilizes your current firmware.

due to the difficulties of flashing custom roms with htcdevs bootloader unlock,id recomend to go forward from there,and set the phone to s-off and superCID. it will make your rom flashing much more enjoyable.

use this guide: http://androidforums.com/desire-hd-...-s-off-simunlock-supercid-inspire-4g-dhd.html

just holler if you have questions.