Questions about bootloader and upgrading for hermes

[Jello79]

Hi everybody,
This is my first post here and first of all id like to say "THANKS FOLKS" for the great job you are doing here just for your passion!
Im writing for Italy and im about to get an "english" (from U.K.) genuine and not branded Htc Tytn so, dont worry, im not about to bother you with questions about italian dumped roms or stuff like that!
Tytn will be my first pda phone and my first "experience" with WM 5 so, before posting, i tried to read as much as i could just to avoid posting old questions, but i didnt find anything to make it bright: if id like to upgrade the rom, the extended rom, the radio rom of my tytn with a genuine htc rom, extended rom and radio rom without upgrading the bootloader, how can i do that?Is it possible?if yes, how?
I ask that coz first, i suppose my tytn will come with the 1.04 bootloader since its brand new, second coz id like to be able to just upgrade the radio rom without upgrading all the rest and third, coz im not really intersted in making it "super cid" or anything else since i wont mount any other immage than the htc ones...
I dont know if i said something wrong or already asked and, if yes, my apologies...if not, i really hope to get some answers...
Tnx everybody and see you next post...
Greeting, Jello

[pof]

if id like to upgrade the rom, the extended rom, the radio rom of my tytn with a genuine htc rom, extended rom and radio rom without upgrading the bootloader, how can i do that?Is it possible?
Hi Jello79 and welcome to XDA-Dev, I see you've done your homework of reading and searching before asking, and no... your question has not been asked before, so we're not going to kick your ass yet (just kidding!) ;)

If you extract a shipped ROM you will see there's a NBH file (http://wiki.xda-developers.com/index.php?pagename=Hermes_NBH) which contains the following ROM parts:
Bootloader: IPL.nb & SPL.nb
Splash Screens: MainSplash.nb & SubSplash.nb
Radio: GSM.nb
Extended rom: ExtROM.nb
WM5: OS.nb

This NBH file has a signature generated with a private HTC certificate, and if you change a single bit of it, the signature will not be valid, so the bootloader will not accept to upgrade the device showing an "invalid cert error (255)".

So the answer to your question is unfortunately "no", you are not able to flash other ROM parts without flashing the bootloader, because all existing NBH files contain a IPL & SPL on them.

Hope it is clear to you :)

[Jello79]

Tnx pof, fast, detailed and bright...now i "just" have to decide what to do..do you have any suggestion?
I think it worths to update all the shipped rom to the newset one...even if it avoids me to upload only the radio rom...what do you think?
Last question:making my tytn a "super cid" one, would make the warranty void?
Tnx in advance,
Jello

[pof]

Tnx pof, fast, detailed and bright...now i "just" have to decide what to do..do you have any suggestion?
I think it worths to update all the shipped rom to the newset one...even if it avoids me to upload only the radio rom...what do you think?
Sorry I can't answer that... depends on how you want to use the device and what do you expect out of it, and how happy are you to loose time changing roms, applying registry settings, installing cabs, etc... If you're a business user with no time and mod to play with it, I'd keep the shipped rom, otherwise I'd go on with upgrades.

Last question:making my tytn a "super cid" one, would make the warranty void?
I haven't read the warranty,... but I guess yes :rolleyes: