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How to Downgrade Nexus s from ICS to 2.3.6 Gingerbread?

Hey I am desperately looking to find how to downgrade my nexus s from the terrible ICS version back to Gingerbread.. I have already tried to flash into 2.3.6 and 2.3.4 using rom manager but got an "installation aborted" response.. I have read here that I can also do it using Odin but couldn't find enough info to understand how to do it. Plus, I am a MAC user but in case there is no solution for it using mac Ill love to get some directions for Windows users.. Any kind of help would be appreciated..
Thanks
Ben Biron
[email protected]

use this thread and download correct version for your phone model then flash through cwm. make sure you download full rom.
http://forum.xda-developers.com/showthread.php?t=1063664

I already tried it but just to be sure l downloaded to right one.. Lets say I want to get any version of gingerbread(2.3 to 2.3.6) so which version I need to download?
this is my phone info
model number: nexus s
android version : 4.0.3
basband version: I9020XXKI1
Karnal version: 3.0.8-gb55e9ac
[email protected]#1
build numberIML74K
Thank you very much!

just like what sean1984 told you, choose your correct full rom phone version from that link
in your case is "basband version: I9020"

worse case scenario search for Odin topic
and you can use Odin to go back to stock

thank you guys for the help.. I tried to use worldclockmode with many rom versions and still unsuccessful... I think Odin is my answer.. Can someone give me direction on how to use it and whiere to get it.. I apologize I REALLY need help.. Thank you very much!!

odin doesnt work nexus s!
if you are stock then you might have to root

Back to stock

Hi Guys,
My girlfriend have a Nexus S and I just flashed an ICS ROM and almost everything is fine, but shes complaining about radio performance. Everything was fine with gingerbread but now she gats poor signal from 3G network.
I dint have too much experience with the Nexus because I used a Galaxy S and now I have a Galaxy S II. With this models I can aways get completely back to stock using Odin.
I was just wondering with this is possible with the Nexus S, so I can put that smartphone back to stock and tell her to wait for que OTA update.
Sorry if this is a dumb question here but, you know, this kind of things changes a lot between different models of Android smartphones.

go here http://forum.xda-developers.com/showthread.php?t=1063664 and make sure you download for correct phone model and flash in cwm

http://forum.xda-developers.com/showthread.php?t=1116884
Or here to flash the radio you or she, had before
Sent from my Nexus S using xda premium

Change the Radio
what phone does she have? I9020T(t-mobile) or I9020a(AT&T) or I9023(international)?
usually ICS roms are coupled with the KI radio. Check if you have it in setting/about phone/baseband version
weak signals are usually caused by baseband/kernel. did you try flashing the stock ICS OTA?
My advice is just swap between KB3-KD1-KF1-and KI1
you might have stronger signal with one of them depending on your region.
Hope I helped

Hi guys!
Thanks a lot for the tips. I'll try to fix the signal thing first and if I can't I'll put the phone back to stock and wait for the OTA update.
Her Nexus S is a I9020a we bought in a travel to Canada and it worked ok in Brazil before flashing the ICS ROM.

Ticiano said:
Hi guys!
Thanks a lot for the tips. I'll try to fix the signal thing first and if I can't I'll put the phone back to stock and wait for the OTA update.
Her Nexus S is a I9020a we bought in a travel to Canada and it worked ok in Brazil before flashing the ICS ROM.
Click to expand...
Click to collapse
The rom you have flashed contains the KI radio(works only on i9020t and i9023) and the rom itself also maybe incompatible for i9020a.
My advice is :
1-to download this ROM(its great)
http://forum.xda-developers.com/showthread.php?t=1397358
2- download the new UCKF1 radio for i9020a:
http://forum.xda-developers.com/showthread.php?t=1116884
follow the steps for installing the rom found in the same thread(including wipes and Gapps)
after flashing, dont restart you phone, flash the UCKF1 radio, wipe dalvik and then reboot.
you should be ok
Ps. even if you flash back to stock it will not work, because the .Zip stock roms on XDA are all OTA and do not contain radios as I recall, just a Rom. If you happen to revert back to gingerbread stock, make sure you flash the radio too

Hi guys,
I liked the idea of flashing a stock rom for the i9020a again, but this stock ROMs are coming in a .tar package that I just cant flash using CWM.
I really sorry for this dumb questions, but I'm used to deal with stock ou custom ROMs with the Galaxy S and now with the Galaxy S II. With this models I just flash a stock ROM with Odin when I want to go back to stock. I don't know how to do this with the Nexus S and I couldnt find that newbie guide using the search. Sorry.

Ticiano said:
Hi guys,
I liked the idea of flashing a stock rom for the i9020a again, but this stock ROMs are coming in a .tar package that I just cant flash using CWM.
I really sorry for this dumb questions, but I'm used to deal with stock ou custom ROMs with the Galaxy S and now with the Galaxy S II. With this models I just flash a stock ROM with Odin when I want to go back to stock. I don't know how to do this with the Nexus S and I couldnt find that newbie guide using the search. Sorry.
Click to expand...
Click to collapse
Check this
http://forum.xda-developers.com/showthread.php?t=1575502
its for NS 4g, but should involve the same steps. Just use the NS files instead.
You need to have:
1-the Firmware TAR file
2-Bootloader file
3-Modem File
Best of luck

[Q] [GRH78] Upgrade to ICS

Got the nexus s today, want to upgrade to ICS
Which version/ROM shuld i use? (preferably the stock official Google ICS 4.0.3, where can i find this?)
Is there a guide anywhere or is it as simple as root, install cwm and update?
Secondly what model is my nexus s? the build number is GRH78 with baseband version as: I9020XXJK8, will this matter? do i need to flash another rom before ICS?
Thanks Craig

for model of your nexus look behind battery and here is a guide to root http://nexusshacks.com/nexus-s-root/how-to-root-nexus-s-or-nexus-s-4g-on-ics-or-gingerbread/ and i recommend this rom http://forum.xda-developers.com/showthread.php?t=1463437

Just wait the official ota is just now being sent out. Or if you don't want to wait there is some pretty stable roms out, whichever you prefer. But the official ota is just now going out in waves.

As stated above, first you need to figure out whether you're i9020a or i9020t which is located under the battery.
You do not need to flash another rom to get ICS and you don't have to root it if you don't want to.
GRH78 is 2.3.1 I think. That's weird because I thought everyone was on at least 2.3.3 by now. First you need this file
http://forum.xda-developers.com/showthread.php?p=11616407
I think you want the GRH78C.
Or you could just follow it here
http://www.androidcentral.com/how-manually-update-your-nexus-s-android-233
I'm not 100% sure about which version of the nexus these are for though. I'm pretty sure they are for i9020. I am just unsure whether the same file works for both T and A versions. I seem to only be able to find one version of the file, so maybe it's the same.
Anyway, using that flashing method, you should now be on 2.3.3.
All of the official upgrades from Google are here
http://forum.xda-developers.com/showthread.php?t=1063664
Just click on your corresponding model, whether it's i9020a or i9020t.
Then you can go from 2.3.3 to 4.0.3 or whatever you want. Use the same flashing method as you used on the Android Central site.

bedalus has done a great work on benchmarking ICS roms. You can find his thread here:
http://forum.xda-developers.com/showthread.php?t=1481856
I've used CyberGR v7 (he has updated to v8) and Oodie Miui ROM. Both have been great for me. You might want to try a few before you know which one you like the most.
To check the version of you phone, you can go to Settings | About Phone. You can find Android version, baseband (radio) and kernel.
Stock ICS can be found here:
http://forum.xda-developers.com/showthread.php?t=1445635
Note that this is only for i9023 devices.

Noob at Galaxy s 4G (impt. question)

hello guys good day 2 all!
my aunt have a galaxy s 4g? (t-mobile)
since froyo is old i want to Upgrade her phone to cm7/cm9/cm10 final (if there is)
but im having a trouble i dont know what correct files should i use this is her phone
-----------------------------------------------------------------------------------------------------------
model number: SGH-T959V
firmware ver: 2.2.1
baseband: T959VUVKD1
kernel: 2.6.32.9
build number: FROYO VUVKD1
----------------------------------------------------------------------------------------------------
can i root it? (if yes can you give me the correct tutorial and files?)
installing CWM latest (can you give me the correct tutorial and files?)
Stable Cyanogenmod (if there is can you give me the correct tutorial and files?)
the TRUTH is im AFRAID to MOD her phone because its not mine and i dont know what correct files
should i use please help me guys!!

droidgeo17 said:
hello guys good day 2 all!
my aunt have a galaxy s 4g? (t-mobile)
since froyo is old i want to Upgrade her phone to cm7/cm9/cm10 final (if there is)
but im having a trouble i dont know what correct files should i use this is her phone
-----------------------------------------------------------------------------------------------------------
model number: SGH-T959V
firmware ver: 2.2.1
baseband: T959VUVKD1
kernel: 2.6.32.9
build number: FROYO VUVKD1
----------------------------------------------------------------------------------------------------
can i root it? (if yes can you give me the correct tutorial and files?)
installing CWM latest (can you give me the correct tutorial and files?)
Stable Cyanogenmod (if there is can you give me the correct tutorial and files?)
the TRUTH is im AFRAID to MOD her phone because its not mine and i dont know what correct files
should i use please help me guys!!
Click to expand...
Click to collapse
Hi,
Yes there is a CM 9/10 for the phone. I have actually installed CM9 on my phone. I wouldn't advise using CM10 yet because some bugs are still being worked out but i'm not discouraging you from trying =). To install it here are the instructions:
1. http://forum.xda-developers.com/showthread.php?t=1730954
That website has everything you need. Also if anything goes wrong there is a method to restore the original firmware. If you need any more help reply and i'll help out =)
Best of Luck!

hahahaha to lazy to search
argh. here is the method ur about to request/Q.1 answer : http://forum.xda-developers.com/showpost.php?p=21953587&postcount=1
Q.1 follow the link that i gave it to you and it will give you not just root but a kernel and BML roms installation guide
Q.2 installing CWM to latest? ahm idunno about it? "I" its possible but twrp is possible ..
Q.3 we dont have stable cyanoge. but barebone i (think that is the name) a gingerbread BML? roms that, that is stable..

And if you're worried about it since it's not your phone, you can at least get to official GB through Kies without voiding the warranty... if you're doing stuff from here you can be sure that the warranty is shot. The Kies one you get straight from T-Mo or Samsung, so if it hoses (and the phone is still under replacement protection) they should cover it. Here... it's more complicated.

the TRUTH is im AFRAID to MOD her phone because its not mine and i dont know what correct files
should i use please help me guys!!
The other option is to have someone do it for you. I soft bricked my phone so I sent it to MobileTechVideos. They fixed it and installed a new ROM for me. Rooting and ROM service is $30. The repair service + new ROM is $60. Make certain that you specify which ROM version you want. No affiliation, just a satisfied customer. Good luck.

I would also wonder does your aunt need a special ROM on the phone? Is this her first smart phone? If so I would just root it and remove all the bloat apps with titanium backup and the phone would be tip top with amazing battery life. Find out what she needs in a phone before installing the ROMs because some features may not work.
I would check for software updates as well because it should be at 2.3 so you can just run it rooted with 2.3 and its a great phone. I ran it like that for quite awhile.
Sent from my SGH-T959V using xda app-developers app

thanks for those who replied i just updated her phone to 2.3 and rooted it plus i removed the bloated apps (just like i did when i got my 1st smart phone hehe!) :angel:

[Q] skyrocket malfunction

Hi I recently bought a skyrocket phone and I Had a question,I checked in menu and version is 2.3.6 but it has a baseband version of t mobile which is t989uvkl1 kernel is 2.6.35.11 and build is ginger.ucla3 which is compatible with stock firm of ATT I guess. I had no signal on phone, is rooted and SU also has cmr installed .How can i fix this mess if there is a solution.I'm noob and I want to know if I had any chance with this. Thank you please help me.:good:

I'd Odin the stock jb rom, ucmc1, and start it fresh.
http://forum.xda-developers.com/showthread.php?p=26056924