[Q] Bootloader jvb and old 2.2.1 - Galaxy S I9000 Q&A, Help & Troubleshooting

if i update bootloader with jvb ones and after i want to flash back a 2.2.1 they are retro-compatible? or i need to reflash all 2 bootloader?

Yes, you can go back to any 2.2 or 2.1 rom with the new bootloader in 2.3.3

Related

From Gingerbread to Froyo

i install the jvk rom with the bootloader but now i want to install miui.To do that i have to be at froyo.Am i have to downgrade my bootloader for froyo and which versions of froyo have bootloader?
No mate, you should be able to flash your desired rom as it's compatible downward. Use Odin, or flash a kernel with CWM and do it that way
But if you find it more comfortable that way, XXJPU and ZSJPG roms have bootloaders as far as i know on samfirmware.com.
thanks man.
i am going to flash EZbase as the base rom.

[Q] How to dowgrade from Gingerbread Radio to Froyo Radio?

I have an Incredible S running froyo. I used the alpha method to S-Off then I rooted the phone. Since I was rooted I decided to add a rooted gingerbread rom. I extracted the rom.zip from the gingerbread RUU for my phone and ran the rom.zip through the Rom Kitchen. Only option I picked was to root. (Kept it simple) The rom wouldn't flash. Kept getting stuck on the slash screen so I used recovery and went back to my working froyo backup. Then I decided to download CM7 rom and flash it. The same thing stuck on CM7 splash screen. Used recovery and went back to my working froyo backup. I figured maybe I need a gingerbread radio for the roms to boot. I installed eng hboot and flashed the gingerbread radio for my phone. I tried installing both my rom and the cm7 rom with no luck. Both roms get stuck on flash screen. So I used recovery to go back to my working froyo backup. Now I'm stuck with a Froyo rom and a Gingerbread radio.(No sound on calls) I tried flashing the original froyo radio but after flashing the froyo radio my phones go into a boot loop with the HTC splash screen. So I flash the gingerbread radio and phone boots up and works again except no sound on the calls because of the gingerbread radio.
So my question. How do I downgrade from a gingerbread radio to a froyo radio? The flash methods I used to originally flash my radio do not work.
Glad to know I'm not the only one that bricked it like that xD... I don't think you can
downgrade... I am thinking about maybe trying to flash Optus through fastboot, but I'm unsure if that will work... But another option is to use a ROM like Revolution or CM7 which are gingerbread.
Same here bro!!!
Same here bros
I got my IS with foryo 2.2, was working fine. I thought to update to gingerbread but was not aware then i will not be able to downgrade or S-OFF.
I just got Gingerbread OTA update of 83.3MB, just updated and now its working fine but
no S-OFF, no customer recovery, no Custom roms
dieing to Downgrade so that i can do S-OFF for rooting and custom rom installation
ANY BODY HELP!!!!!!!!!!!!!!!!
charch said:
Glad to know I'm not the only one that bricked it like that xD... I don't think you can
downgrade... I am thinking about maybe trying to flash Optus through fastboot, but I'm unsure if that will work... But another option is to use a ROM like Revolution or CM7 which are gingerbread.
Click to expand...
Click to collapse
I'm pretty sure there was others.
araheels said:
Same here bros
I got my IS with foryo 2.2, was working fine. I thought to update to gingerbread but was not aware then i will not be able to downgrade or S-OFF.
I just got Gingerbread OTA update of 83.3MB, just updated and now its working fine but
no S-OFF, no customer recovery, no Custom roms
dieing to Downgrade so that i can do S-OFF for rooting and custom rom installation
ANY BODY HELP!!!!!!!!!!!!!!!!
Click to expand...
Click to collapse
First try the AlphaRevX method to S-Off. From there you should be able to install custom recovery, root, and install custom roms. If you can not S-Off with the AlphaRevX method then install a gingerbread rom on your phone from another region through gold card method then use the AlphaRevX method to S-Off. (Most people been using the Australia Optus Rom)
radio
NardVa said:
So my question. How do I downgrade from a gingerbread radio to a froyo radio? The flash methods I used to originally flash my radio do not work.
Click to expand...
Click to collapse
Where you using this method to flash your radio ?
http://forum.xda-developers.com/showpost.php?p=15023458&postcount=6
jul644 said:
Where you using this method to flash your radio ?
http://forum.xda-developers.com/showpost.php?p=15023458&postcount=6
Click to expand...
Click to collapse
Yeah that is the method I used. I thought with eng hboot I had the flexability to bounce between radios but for what ever reason once you go to a gingerbread you can't go back to a froyo radio.
Sent from my HTC Incredible S using XDA Premium App
Bro thanks for a quick reply,
i did with both ROMS optus and WWE but AlphaREV is not working
just strucked on
WAITING FOR FASTBOOT
then nothing happens for ages..........
help........
THANKS BROTHER FOR UR HELP ATLAST I DID IT/MANAGED IT with VIRGIN/AU ROM
i flashed
RUU_Vivo_Gingerbread_S_Virgin_Mobile_AU_2.12.981.2_R_Radio_20.2803.30.085AU_3805.04.03.12_M_release_185029_signed.exe
with gold card inside IS
via PC running direct RUU

[Q] XXJVS Bootloader with CM7

Hi,
Currently, I have GB bootloader with lastest CM7 nightly 104#.
1. I was wondering if flashing XXJVS would install a newer or updated GB bootloader.
2. Is there a tool to compare bootloaders before flashing?
Thanks
Not much difference between all GB bootloaders. Only Froyo and GB differ more

GB Firmware

Hi. I have my SGSII which is really easy to modify and install firmwares and ROMs, but my fathers X8 is messed up. All I could find is ROMs but not firmwares for download. I can't install 2.3 ROM on 2.1 fw, right?; At least not on SGSII, so where can I dl GB firmware?
Maybe I'm stupid, but what's the difference between ROM and firmware? SE doesn't support x8 any more and left xperia owners with official Eclair 2.1 ROM, so all You are able to do is root Your father device, install recovery and flash a ZIP file which include GB 2.3 ROM for stock kernel (Like GingerDx f. eg.).... OR unlock bootloader (if You can of course, manufacture date here is important), flash custom kernel and than flash custom ROM (like GB MiniCM7 or iCS MiniCM9).
Well while I was reading on SGSII subforum tips I saw that you cannot flash ICS rom on Android 2.3, you have to install first ICS firmware, then flash ICS ROM.
Thanks I will try flashing GB ROM.

[Q] Is this bootloader information correct?

[UPDATED]
Bootloaders...
1. i9000 was launched with Éclair so the bootloader was of course an Éclair bootloader?
My answer: Yes (Or a Froyo one... before Froyo came out).
2. People who upgraded to Gingerbread from Éclair without upgrading via Kies had to flash a Gingerbread bootloader via Odin?
My answer: Yes, unless flashing different rom complete with a bootloader.
3. Flashing ANY rom wont change the bootloader? Like CyanogenMod.
My answer: No, some rom's do come complete with a bootloader like stock or stock based ones. But CyanogenMod does not.
4. I'm running CM9... does that mean I have an Ice Cream Sandwich bootloader now?
My answer: No, the Gingerbread bootloader is more than capable.
Are my own answers correct?
I'm so confused by different things I've read off the net... please please someone put my mind to rest! I'm writing a few BIG guides and kinda came unstuck when I got to this subject lol.
mod2max said:
Bootloaders...
1. i9000 was launched with Éclair so the bootloader was of course an Éclair bootloader?
2. People who upgraded to Gingerbread from Éclair without upgrading via Kies had to flash a Gingerbread bootloader via Odin?
3. Flashing ANY rom wont change the bootloader? Like CyanogenMod.
4. I'm running CM9... does that mean I have an Ice Cream Sandwich bootloader now?
I'm so confused by different things I've read off the net... please please someone put my mind to rest! I'm writing a few BIG guides and kinda came unstuck when I got to this subject lol.
Click to expand...
Click to collapse
No cyanogenmod packages come with bootloaders. I don't think that cwm will flash them. I think you need Odin or Heimdall to flash bootloaders. Unless you flashed a package that had bootloaders, you should still be on gb bootloaders, which work for just about everything.
Sent from my SGH-I777 using xda premium
1. Idk that was along time ago lol
2. If you update with Odin factory images, it always contains the boot loader.
3/4. Flashing custom ROMs use the gingerbread bootloader, and do not change it ever.
Sent from my GT-I9000 using xda premium

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