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Question about Nexus One SLCD and unlocking bootloader

Hi all,
i have an Nexus One SLCD and want to flash the US Stock Adroid rom so i can get all further updates directly from google OTA.
I don't need root and i don't care if unlocking my bootloader will void my warranty.
The problem is: all i can find are many FAQs about "rooting without unlocking the bootloader".
Since i'm not interested in any custom roms, can somebody please explain to me how i can flash the stock us rom on my german Nexus One SLCD?
Is there any faq for this available?
As i said my two important points are following:
- i want the us stock rom
- i want OTA updates
I would appreciate a short step-by-step description (i did this with my old Nexus One AMOLED but it seems like the older roms don't work with SLCD devices as the drivers are missing, so in don't know which rom to flash after i unlocked the bootloader).
thanks!

Look in Nexus One Wiki, "Unroot/Restore your Nexus", PASSIMG method.
Flash Korean FRF91 ROM.
AFAIK, there is no US ROM with SLCD support.

Jack_R1 said:
Look in Nexus One Wiki, "Unroot/Restore your Nexus", PASSIMG method.
Flash Korean FRF91 ROM.
AFAIK, there is no US ROM with SLCD support.
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thanks! i checked the FAQ and have a question about this:
"Using PASSIMG.ZIP method (adapted from here):
1. Revert HBOOT to older version, if needed (required for pre-FRG33 stock builds and for flashing CyanogenMod ROMs).
* Use the following steps to flash PASSIMG.ZIP that differs from EPF30.
"
it says that i have to revert the HBOOT if i have pre-FRG33 stock build (which is the case for me).
but when opening the link the first post says:
"this is especially useful for people who wish to use the rooting method without unlocking the bootloader. If you already have an unlocked bootloader, there is no reason to follow this guide."
since i want to unlock my bootloader, do i need the above mentioned steps at all?
edit: just saw that you updated your reply. is there really no us rom supporting slcd? i was hoping this was the case as even developer phones should start being sold as SLCD versions...

If you have HBOOT 0.33, then you don't need to downgrade it - which leaves you with easy procedure. I've changed the Wiki to be more understandable.

Jack_R1 said:
If you have HBOOT 0.33, then you don't need to downgrade it - which leaves you with easy procedure. I've changed the Wiki to be more understandable.
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Click to collapse
sorry for the dumb question. But how can i check which HBOOT version i have and if i have HBOOT 0.33, does this mean i don't even have to unlock the bootloader (via fastboot) to be able to flash the US STock ROM?

Reboot to bootloader (fastboot), it'll show you the version at the top of the screen.
Unlocking the bootloader isn't required anyway. If all you want is to have a stock ROM - then keep the phone stock, since unlocking won't be of any use to you.
You can flash US stock ROM (FRF91 PASSIMG - link exists in Wiki), but if you happen to end up with a phone that goes black after "X" splash screen - don't say I didn't tell you

Jack_R1 said:
Reboot to bootloader (fastboot), it'll show you the version at the top of the screen.
Unlocking the bootloader isn't required anyway. If all you want is to have a stock ROM - then keep the phone stock, since unlocking won't be of any use to you.
You can flash US stock ROM (FRF91 PASSIMG - link exists in Wiki), but if you happen to end up with a phone that goes black after "X" splash screen - don't say I didn't tell you
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Click to collapse
But wouldn't my Vodafone Firmware throw an error if i just try to flash a stock us rom? And i would rather try to directly flash the newest rom, because as you said i don't think that FRF91 supports lcd.
Edit:
sorry i just realized that i haven't even mentioned until now that i'm talking about an european vosdafone nexus one SLCD (FRF91)...

The newest FRG83 ROM doesn't exist yet in PASSIMG version that I'm aware of. If it would exist - or if it appears at some point - it'll be easily flashable over FRF91, no matter what build.
Anyway, looks like Korean ROM won't help you, since it doesn't seem to receive OTAs either (I guessed you have VF version). I'm not aware of any other "clean" FRF91 ROM that supports SLCD, and I've googled it for 1/2 hour. You could wait until FRG83 PASSIMG appears, I guess...

Thanks. I rooted my Nexus One now. Guess I have to wait until the passimg FRG83 emerges. But if I want to keep root I have to wait until the passimg is rooted correct? And how long does it usually take until a new stock build is provided as passimg with root?
Jack_R1 said:
The newest FRG83 ROM doesn't exist yet in PASSIMG version that I'm aware of. If it would exist - or if it appears at some point - it'll be easily flashable over FRF91, no matter what build.
Anyway, looks like Korean ROM won't help you, since it doesn't seem to receive OTAs either (I guessed you have VF version). I'm not aware of any other "clean" FRF91 ROM that supports SLCD, and I've googled it for 1/2 hour. You could wait until FRG83 PASSIMG appears, I guess...
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Click to collapse
Sent from my Nexus One using XDA App

I have found following link:
http://android.modaco.com/content/google-nexus-one-nexusone-modaco-com/318475/frg83-android-2-2-1/
There is a link to a rom:
http://android.clients.google.com/ packages/passion/signed-passion-FRG83-from-FRF91.c8847c98.zip
Can I use this to switch from frf91 Vodafone to stock us FRG 83 rom?
Sent from my Nexus One using XDA App

can anyone answer my above question?
my aim is to have a stock us rom (root is no must - so no problem if i lose it during the process. currently i have a rooted vodafone FRF91 device.)

No you can't use that to upgrade the Voda ROM.
As it stands now you'd have to root the phone (using UniversalAndroot if you want to stay locked), and use fastboot or flash_image to "update" system.img and boot.img to the USA/Google orginal ones.

Rusty! said:
No you can't use that to upgrade the Voda ROM.
As it stands now you'd have to root the phone (using UniversalAndroot if you want to stay locked), and use fastboot or flash_image to "update" system.img and boot.img to the USA/Google orginal ones.
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Click to collapse
i have unlocked my bootloader now and rooted my device. is there any manual on how i can update system.img and boot.img with fastboot. And where can i find those files? Is there a risk to get a blank screen (SLCD)?

[Q] Verizon 2.3.4 out. Is it possible to get a ftf or update.zip of this

As I stated in the title. Anyone know how long the wait may be before those of us with unlocked bootloaders and rooted Xplays are able to get this in a ftf or update.zip format to flash manually? I am liking the 720p camera and of course the auto brightness option.
Or if someone knows if its a pain in the ass to create one of the above? I am sure that in order for any of this to happen someone would have to gain root access and then flash a recovery to do a complete backup, then piece it together and or convert it to one of the above formats.

Are you sure 2.3.4 is out for Verizon?
2.3.3 came out like 5 days ago.....

sorry, your right. I meant 2.3.3. By the way, would it be possible to flash a 2.3.4 ROM from the UK and then just flash the CDMA files from Frasertags ROM?
Do we know what the changelog is or the Verizon update? I cannot find it anywhere.....
Also, I now its the wrong thread but if I relock my phones bootloader and relfash stock ROM so I am unrooted, and I flashed the new 2.3.3 ROM, if I wanted to unlock the bootloader then would it be the same key I used to unlock the first time?

jgregoryj1 said:
sorry, your right. I meant 2.3.3. By the way, would it be possible to flash a 2.3.4 ROM from the UK and then just flash the CDMA files from Frasertags ROM?
Do we know what the changelog is or the Verizon update? I cannot find it anywhere.....
Also, I now its the wrong thread but if I relock my phones bootloader and relfash stock ROM so I am unrooted, and I flashed the new 2.3.3 ROM, if I wanted to unlock the bootloader then would it be the same key I used to unlock the first time?
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Sorry I run my phone stock not sure if any of that will work.
As for the changes, there is no changelog but there is another thread I think in Q&A where everyone has been documenting changes. 720P video recording is not one of them.
The major ones: better autobrightness and a way to disable it and Media Server (awesome feature, stream stuff from your phone wirelessly to any DLNA device).

Thanks Rogue, I found the thread about the changelog stuff..... where people are posting there findings. The 720p is from 2.3.4.

To answer earlier questions: If you re-lock your bootloader you _SHOULD_ be able to safely apply the OTA (or a flash file) and then re-unlock using the same code. However, I would probably try to do it via SEUS instead of the OTA. That way you can have the files ready just in case you need to unbrick and re-do it. There are unbrick from bad OTA threads around in case you booger the thing.
I wonder if somebody who hasn't unlocked could use SEUS (SonyEricsson Updater Service software) and download a copy of the flash and post it up for us. I imagine the Devs would like to have it, as well as the general unlocked community. I saw what looked like a link to a .IMG file over in the dev section that somebody was claiming was the R800x 2.3.3 (the new OTA) but I haven't verified it yet.

[attn] root and unlock your 4.4.2 xt926 now!

Hey, go ahead and take the OTA now, and do it NOW because another OTA is on the way that will definitely remove the root exploit which means unlocking your bootloader will be gone.
As SamuriHL and LifeAsDroid have mentioned in other threads, THIS IS A GIFT FROM THE MOTO GODS (an inadvertent gift that wasn't meant to be given to you, but it has been), so PLEASE take it NOW and use it, abuse it, whatever.
BTW, if you're worried about warranty, you already will void it once you root and they have a root checker built in, so they CAN tell if you rooted or not, so if you're going to root, you might as well unlock the bootloader too.
So, go here to root AND unlock your phone. SamuriHL has been keeping new findings up-to-date with this thread, so do it now:
http://www.droidrzr.com/index.php/topic/46155-rootunlock-razr-hdm-build-183-kitkat-towel-root/
Get Towelroot and the latest Motopocalypse files from SamuriHL and unlock your bootloader. Do this NOW because I just received an email today about another upcoming soak test, which means, root WILL be lost (Towelroot only works on kernels dated before June 3rd, 2014) which also means, once you lose root, you cannot use Motopocalypse to unlock your phone AND they'll probably re-patch the unlock exploit again.
So, do it now or forever hold your peace.

There already is a thread for this here: http://forum.xda-developers.com/showthread.php?t=2783912
Thread closed.

I am waiting for CM, not yet unlocked/rooted: Do I update to B27?

I basically am holding out switching my daily driver to the Axon 7 until we have a fully functional CM or other clean ROM with root capability. My Axon 7 is on B20, and I got the update notification. Any reason I should avoid going to B27?
My concern is that we've found an unlock workaround for B20 but I am not clear if it works on B27, and I don't think ZTE has re-opened unlocking after the B27 update. So is updating a big risk that I won't be able to unlock/install CM when it is feature-functional?

I'll be very simple and easy answer.
Yes , Unlock Bootloader with know method base on B20 and you'll still be able to get goodies

DrakenFX said:
I'll be very simple and easy answer.
Yes , Unlock Bootloader with know method base on B20 and you'll still be able to get goodies
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Click to collapse
I am sorry, I am interested too in this topics and I do not understand well.
If I unlock the bootloader on the B20 and root the phone, can I simply update the smartphone at the B27 (and others) with the ZTE OTA updates without brick the phone or lost the unlock bootloader?
Thanks
Edit: I found the asnwer in an other topic, I am sorry.

youngz89 said:
I am sorry, I am interested too in this topics and I do not understand well.
If I unlock the bootloader on the B20 and root the phone, can I simply update the smartphone at the B27 (and others) with the ZTE OTA updates without brick the phone or lost the unlock bootloader?
Thanks
Edit: I found the asnwer in an other topic, I am sorry.
Click to expand...
Click to collapse
No problem, in your case just unlock bootloader and get the update.
No need to root till you are B27.

DrakenFX said:
No problem, in your case just unlock bootloader and get the update.
No need to root till you are B27.
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Click to collapse
Cool, so if I unlock my bootloader on B20, I can do the OTA update to B27 and that won't cause problems? Can I install TWRP on B20 without breaking updates?

Bootloader unlocked = no more OTAs for you.

DrakenFX got us from unlocked B20 to unlocked B27 - I have faith in him

RedWave31 said:
Bootloader unlocked = no more OTAs for you.
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Click to collapse
I've unlocked my bootloader on B20 and was able to upgrade to B27 with no issues.
Stock B20 -> Upgrade to B20_Boot -> Unlocked bootloader -> Downgraded back to B20 -> Upgraded to B27 -> Bootloader still unlocked

xtermmin said:
I've unlocked my bootloader on B20 and was able to upgrade to B27 with no issues.
Stock B20 -> Upgrade to B20_Boot -> Unlocked bootloader -> Downgraded back to B20 -> Upgraded to B27 -> Bootloader still unlocked
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Click to collapse
Oh, of course you can UPDATE. You just can't do it via a "real" OTA : you have to go here, get the files, apply modded updates via sdcard.

RedWave31 said:
Oh, of course you can UPDATE. You just can't do it via a "real" OTA : you have to go here, get the files, apply modded updates via sdcard.
Click to expand...
Click to collapse
What about receiving OTAs on rooted devices that haven't unlocked the bootloader?
I'm on B27 and I've been waiting for some progress before unlocking or rooting due to the plethora of issues reported like broken wifi, or camera, etc, but I'm getting tired of BS that could be dealt with if I had root such as the insufferable YouTube ads. I'm not going to watch an unskippable 30 second ad for a 2 minute video. I looked into it and the process of simply rooting it seems pretty convoluted (requiring drivers, flashing multiple things, etc) and some parts are ambiguous. For example there was no specific instructions, on the guide I was looking at, about how to install TWRP which I want to see stated clearly since again there are reports of people screwing up their phones simply trying to install that.
I'm kind of surprised there isn't an all-encompassing sticky with links to every possible issue and how to resolve them and I'm sitting here wondering if there's every going to be solid support for this device with easy root/unlock/recovery/updates like other flagships have.

Cyrus D. said:
I'm kind of surprised there isn't an all-encompassing sticky with links to every possible issue and how to resolve them and I'm sitting here wondering if there's every going to be solid support for this device with easy root/unlock/recovery/updates like other flagships have.
Click to expand...
Click to collapse
You might be looking for this thread?
About B27 and Cyanogen
- From what I've read, you still have to downgrade to B20 to unlock/root/twrp then update to B27 using modified files.
- Once you got TWRP, you have several options to restore your phone in case of problems (despite full stock firmwares being limited to EU models - officially)
- From the actual state of Cyanogen, to me, you're better off unlocking+rooting and using xposed than installing CM
- Unfortunately, the systemless root isn't compatible with Xposed (and likely will never be) so you don't have a "temporary" solution
- Think about us poor A2016G users in europe
About Root+OTA's
- If you have systemless Root, you can have the OTAs, but it will wipe the root...
About TWRP, if I remember correctly there is one requirement:
- Being unlocked (Guide here)
- Installing it (Guide here)
I am, myself, waiting for a repartition tool, because 14GB being used by system is making my eyes roll so hard I'm getting motion sickness. A stock MM build is 400MB today, and I can't believe there is 13.5GB worth of camera and wallpapers in here (so, wasted space)
- We can dream it's here for the Nougat Dual Boot system, but even then, 14GB !!!

RedWave31 said:
Oh, of course you can UPDATE. You just can't do it via a "real" OTA : you have to go here, get the files, apply modded updates via sdcard.
Click to expand...
Click to collapse
Nope. I used the official ZTE OTA update that I grabbed from ZTE servers myself. I did not use any sort of modified update. Yes, I did sideload it via sdcard, but that was because I didn't want to bother connecting to the network. I used ZTE's official update and applied it through the stock recovery fine.
---------- Post added at 11:29 AM ---------- Previous post was at 11:27 AM ----------
RedWave31 said:
- From what I've read, you still have to downgrade to B20 to unlock/root/twrp then update to B27 using modified files.
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Click to collapse
See above. Did not have to use modified to update from stock B20 (with unlocked bootloader) to stock B27 (still with unlocked bootloader).

I am interested in this post as I am in the same boot. I am kind of waiting for stock firmwares before I start messing around because things have gone wrong it the past that only a fresh install have fixed. I am good with my current build and am just missing xposed and all the ad block features.

xtermmin said:
Nope. I used the official ZTE OTA update that I grabbed from ZTE servers myself. I did not use any sort of modified update. Yes, I did sideload it via sdcard, but that was because I didn't want to bother connecting to the network. I used ZTE's official update and applied it through the stock recovery fine.
---------- Post added at 11:29 AM ---------- Previous post was at 11:27 AM ----------
See above. Did not have to use modified to update from stock B20 (with unlocked bootloader) to stock B27 (still with unlocked bootloader).
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My bad, I just assumed that unlocked meant modified recovery with TWRP (and in that situation, it seems OTA won't work). "Just" unlocking the bootloader with everything else stock is usually rare.

change firmware for u ultra

I got a 128gb version of u ultra from taiwan last week,so i want to switch it to HK firmware,I use chimera tool to s-off and change cid to HTC__622.and flash the HK RUU,But i can't receive ota update,can anyone help?thanks.

cecc500 said:
I got a 128gb version of u ultra from taiwan last week,so i want to switch it to HK firmware,I use chimera tool to s-off and change cid to HTC__622.and flash the HK RUU,But i can't receive ota update,can anyone help?thanks.
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I don't think there an update for 128GB version. Is yours 1.15? If yes it's the latest.

Whileitlasted said:
I don't think there an update for 128GB version. Is yours 1.15? If yes it's the latest.
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1.09 ,as i only found 1.09 ruu

Also,i can't relock the bootloader as the OEM unlocking option is greyed out

cecc500 said:
Also,i can't relock the bootloader as the OEM unlocking option is greyed out
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It makes sense to me the option is grey out since you unlocked the phone with chimera tool instead of HTCDev. Also one doesn't need to relock the bootloader for OTA, i.e. simply unlocking the bootloader doesn't affect OTA.
Come to think about it I haven't heard of an update for 128G, the 1.15 is for 64G. I could be missing something though.

Whileitlasted said:
It makes sense to me the option is grey out since you unlocked the phone with chimera tool instead of HTCDev. Also one doesn't need to relock the bootloader for OTA, i.e. simply unlocking the bootloader doesn't affect OTA.
Come to think about it I haven't heard of an update for 128G, the 1.15 is for 64G. I could be missing something though.
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Click to collapse
i think the firmware is the same,so i really don't understand why i can't receive OTA. CID is correct.