[General Questions and Answers] jauffre:
Hi to all, i'm jauffre and i'm new in XDA. I have a problem and, as i searched all the forum without finding an answer, i need your help.

Last week i rooted my htc incredible s using the revolutionary tool, wich upgraded the hboot to 6.13.1002. i installed with the clockwork mod recovery tool a modded rom, and it was great. but sunday my phone crashed to the ground, and now the cover is broken (so i need to send it to the warranty).

i spent last day searching a guide for dummies to unroot the phone, and using the signed RUU (downloaded from this site) it appeared to work, but my htc is still s-off.

now, i know i need to downgrade the hboot, and i tried everything (i reinstalled froyo, updated the radio and then updgraded to 2.3.3), but this is still a problem.

please, help me!

Hey guys, this is the procedure i did to solve my problem. do it at your own risk.

first of all i must say that with this process i'll have the hboot back, but NOT the bootloader (so when you hold "volume back+power on" you will see the modded bootloader, not the stock one). i don't know how did you rooted your phone, what programs did you use, and i cannot assure you this procedure will work. if you're not sure, don't do anything.

first, you have to look for the original RUU of your phone (you can find it on this site). then follow this thread to find the rom.zip file (http://xdaforums.com/showthread.php?t=790022), where you can find several files. you need the android-info.txt and the hboot_xxx.img files.

open the hboot.img file with a text editor; in the first line you can find many strange symbols, and after that there will be a string of numbers (that is the hboot version).

you have to know what version of hboot have you currently on your phone (if you used the revolutionary tool, it will be probably 6.13.1002) and simply change the hboot.img string so that the release number is higher (than the modded hboot; i.e. you can write 7.09.0000).

after that you have to make a zip file with the android-info.txt and the hboot_xxx.img file you have just modified, and if you have an incredible s, call it "pg32img.zip".

if you have another device, simply you can turn on your phone in the bootloader mode, and if there's a memory card the device will look for a file, which name appears (it's the code you need).

then put that pg32img.zip file on the root of your sd card, reboot in bootloader mode (volume down+power) and follow the instructions to do the upgrade. after that, if you restart in bootloader, you'll see that the hboot version will be 7.09.0000 (the same you wrote) and will be s-on.

now, search and download the latest version of "superoneclick" (an application that should root and unroot your phone), and start it. link your phone to the pc and start the unroot process.

when it is done, simply leave your phone linked to the pc and start the RUU.exe file you downloaded. start the update process and if you have done everything good, at the end you'll have your phone with the stock hboot and the s-on.

i'm not a serious programmer, i simply was really lucky (i really didn't know if that could have worked) but i did it. i don't know how did you do the root, and how does the superoneclick work, so i am not responsible for any bricked phone.

if you are not sure, simply send your device to the htc assistance (better pay than have a new paperweight).

good luck