Undo SnowJB - AT&T LG Optimus G

I had installed and enjoyed SnowJB, but now that a bunch of new Roms are out, I wanted to try them. They all seem to require that you be on JB via the OTA. Problem is, that after I restore my backed up stock (ICS) rom, software upgrade tells me that there is no upgrade available. Is there a way (simple as possible) to get to where I can try these new roms? I see that there are now stable 4.2 roms and I really want to try some. Particularly interested in CFX.

Did you do LGNPST? that is a true reverting back to stock.
If you havent do LGNPST. And instead of stock ics firmware, use jellybean firmware
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TeenyBin
Sent from my LG-E970 using xda premium

Go to this thread http://forum.xda-developers.com/showthread.php?t=2230994 and look for "Additional Info" at the end of the OP and you will find a button of "SHOW CONTENT" about how to use the LGNPST, good luck.

Related

[q] (question) can i downgrade form ics in sgs2 safetly?

Hi every to every one i recently upgrade my SGS2 to ICS 4.0.3 but i found it full of bugs, i mean a lot, (by the way wait until the official release from samsung, thas my opinion) like the non data network miss
My question is, is it safe to downgrade the Phone to GINGERBREAD?
Gosh i love this page
Yes its safe, just make sure to properly install a Gingerbread rom. Next time, just make a backup before installing a new rom so thats its easier to revert back to old rom.
By properly you mean official? Also any gingerbread like 2.3.6? And not the phone stock firmware.
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getabu said:
Hi every to every one i recently upgrade my SGS2 to ICS 4.0.3 but i found it full of bugs, i mean a lot, (by the way wait until the official release from samsung, thas my opinion) like the non data network miss
My question is, is it safe to downgrade the Phone to GINGERBREAD?
Gosh i love this page
Click to expand...
Click to collapse
You can check if you have made a back up by going into Rom Manager, manage and restore backups, have a check in their. If you have made a back up the just restore using that back up.
The CWM just gave me the finger XD i do a clean install of the ICS just in case but dont occurred to me to do a backup
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search on the original android dev forum in here for the stock roms, download whatever you want to downgrade and flash with odin you will be back to GB 2.3.6 or lower if you want to
getabu said:
The CWM just gave me the finger XD i do a clean install of the ICS just in case but dont occurred to me to do a backup
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
You will need a stock kernel to go with that as well
yeah its save i did it too.

How do I go back to stock JB?

So im I was on ICS 4.0.4 and i used the CM10 nightly. Now that the offical JB update is here, how do I go back into stock ICS, and update to JB?
I know theres a lot of guides, but i need some1 that can dumb it down. I already backed up everything using titanium backup, and saved it on to my desktop as well.
Well, if you are unlocked, as it seems you must be, then I don't believe there is anyway you get the ota update even if you were to go back to ics.
So that leaves you with using something like Craig's excellent JB Stock rom you can find here:
http://forum.xda-developers.com/showthread.php?t=1911024
If you follow the clear instructions there completely you are good to go.
Goodluck

CUSTOM ROM guide needed

Hi,
I have been away for a long time here. Been using checkromhd v6 since then. This is a GB rom.
I thought maybe its time to get me a new rom.
I come here and see al these new features : mali, vsync, aroma, dualboot .....
Isn't there a romguide or something? Because this all is getting very difficult.
On gingerbread I think it was easier.
There where lesser option which made it easier to choose. There where also fewer cooks for the SGS2 back then.
If anybody can help me a bit coming up to speed with al this new stuff, I would be very thankfull.
EJ
The Netherlands
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Hey.it's always be guide how to install Rom in these topics...
Send form Galaxy S2. Using XDA Premium
The stickies in the general section have guides to everything right from upgrading from GB to ICS and rooting,dual booting, flashing, etc.
Only thing missing there is details on the latest updates on cm10 and build 4. In brief, the roms based on these two will not run on earlier kernel versions..coz of the new Mali drivers you mentioned.
Aroma basically makes installing a ROM simpler with the help of a GUI. kinda like the installation wizard you have on windows PCs.
Have a look through the stickies (especially the one on the emmc brick bug) and if you have any questions..always happy to help as best I can.
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efjbdejong said:
Hi,
I have been away for a long time here. Been using checkromhd v6 since then. This is a GB rom.
I thought maybe its time to get me a new rom.
I come here and see al these new features : mali, vsync, aroma, dualboot .....
Isn't there a romguide or something? Because this all is getting very difficult.
On gingerbread I think it was easier.
There where lesser option which made it easier to choose. There where also fewer cooks for the SGS2 back then.
If anybody can help me a bit coming up to speed with al this new stuff, I would be very thankfull.
EJ
The Netherlands
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
Everything is pretty scattered even for people who are sort of on the lookout and have tried various newer ROMs.
Dualboot is a feature in custom kernels, at least Siyah that I know of, where you can have more than one ROM installed and choose at boot time which one to use. I gather that its mostly useful for people wanting to try the experimental builds of Jelly Bean and have a stable Ice Cream Sandwhich.
Aroma is an installer which is sort of a second step after a CWM flash, and before an install, and allows you to choose via checkboxes which extra options you might want. This is up to the ROM maker as for what selections you might have. Examples are sometimes which kernel, which Samsung apps that aren't included in the ROM, etc.
I don't know what mali and vsync are but I would guess that vsync has something to do with graphics and maybe with the experimental Jelly Bean builds.
The only really important thing I can thing of is, as always, to do a nandroid backup before starting anything and possibly since you have Gingerbread you might need an older Kernel on hand with older CWM for a recovery back to Gingerbread... This needs to be addressed by someone who can clarify and it might also be necisarry to flash a newer kernel and CWM that will allow you to enter a recovery mode that will be compatible with newer ROMs but I don't know if this is the case or not. Again, this needs to be addressed by someone more helpful.
More important than the above is that, since you've apparently been out of the loop for a while, there's been a bug that can render a hard brick on some devices depending on various hardware components and the version of CWM used for flashing. There's a sticky thread about this but the safest thing way to go about it, as I understand, is to just not flash a 4.04 ROM but use a 4.03 one. I've used both and prefered the options available in 4.03, for my needs, as far as mods go.
Also, as for Jkay's work, some ROMs incorporate that and some incorporate similar features but aren't near as feature rich. As with Gingerbread there's only so many ROMs that he's done the work for and it now requires not just flashing of a framework, as was in Gingerbread, but purchase of the app from Google Play that will allow you to customize the settings. The thread is here http://forum.xda-developers.com/showthread.php?t=1667846
As for theming, its easier to choose a ROM that has it done already and is compatable with Jkay's framwork (assuming you want those things). You can, use a stock ROM, theme it, install Jkay's framework and it will work quite well but its more work. Vertimus themes are very popular but the site navigation is confusing and will definately be daunting. It would be necissary to read first before making any changes (themes or tweaks) deviating from initial setup. The easiest thing is just to choose something, assuming you want it, already themed and tweaked for Jkay's app to work in advance. Wanam builds seem pretty popular for this and as for the hard brick bug possibility with CWM on 4.04 ROMs, you can probably follow the current Wanam build download into his site and find his forum, search for a 4.0.3 ROM (LPG has played best with my particular handset) and make sure its for the SGSII as people often build for more than one phone and it would be a shame to flash an SGSIII ROM (or something else) on accident, for example.
My recommendation, in summary, is not to worry about dual booting or those other things for the moment, do nandroid backup if you intend to upgrade, find out if you need to have older CWM to downgrade (a flashable one at that in case you get stuck at a boot loop) or a newer one to upgrade, then keep it simple and choose an already themed and Jkay tweaked (you'lle have to buy the app) ROM that isn't a 4.0.4 build of Android, but 4.0.3, and to stay with Samsung based ROMs as a starting point. From there you can get a feel for for things and decide if you like the theming or if you want flash something else with stock Touchwiz, if dual booting is worth the trouble, and then bother to read about the other things you mentioned that I wasn't able to answer... so basically, keep the upgrade simple and then go from there and quite frankly if that means a stock upgrade to unmodified Samsung firmware then so be it.
If I backup my rom, cant I just restore it without worrying about the kernel?
Thanks all you guys for briefing me.
Thank you very much!!!!
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Another thing. Obviously all my apps run on gb. Will they run on ICS to? Especially the gameloft games?
EJ
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efjbdejong said:
If I backup my rom, cant I just restore it without worrying about the kernel?
Thanks all you guys for briefing me.
Thank you very much!!!!
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
it depends on the Kernel ma8 if its compatible with ur older rom then fine, else u will have issues in resotring the bkp
efjbdejong said:
Another thing. Obviously all my apps run on gb. Will they run on ICS to? Especially the gameloft games?
EJ
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
yes they all run on ICS and JB
efjbdejong said:
If I backup my rom, cant I just restore it without worrying about the kernel?
Click to expand...
Click to collapse
As far as I know, you can't restore a GB ROM on an ICS kernel and vice versa.
efjbdejong said:
Another thing. Obviously all my apps run on gb. Will they run on ICS to? Especially the gameloft games?
Click to expand...
Click to collapse
If they've been updated to run on ICS by the game devs..they will. You'd have yo check that out on the game's page. But since a factory reset is recommended when going from one android version to another you might not be able to save the app data..ie, current state of the game on GB and then resume on ICS.
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Ok thx again guys !!!!!!!
EJ
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If you want to restore you GB do that.
1.Flash GB stock Rom to your phone
2.Then search CWM recovery compatible to GB
3.If you found it flash it
4.then restore your backup
Send form Galaxy S2. Using XDA Premium
Ok I checked and have this file " CF_ROOT_5_0_CWM.zip" on my phone. I also have different kernels ony phone which work with my current rom. This is enough to get me back to GB2.3.6 ?
What would the proces steps be if I am on an ICS rom and want to go back to GB?
Thanks in advance,
EJ
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I did writed now look in previous post
Send form Galaxy S2. Using XDA Premium
Sorry we posted at the same time lol.
Ok so I just flash an original Samsung GB rom over the ICS custom rom? Then root it and restore my backup
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Yes.Do you have nandroid backup ? If yes. So you need to root it or use temporary cwm.
When you do that you can restore nandroid.
Send form Galaxy S2. Using XDA Premium
oh and another thing.. there still are some GB roms. If all you want to do is try another rom and prefer sticking to GB..you could look up this link
http://forum.xda-developers.com/showthread.php?t=1529173
All JB, ICS and GB ROMs for the i9100 are indexed here.
Thx.
I have a nandroid backup....
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Flashing jb rom

Hey guys I'm having some trouble flashing jb roms. It always freezes during the install. I'm currently on ics.
Sent from my SGH-T959 using Tapatalk 2
I never flashed from ICS that I recall. However, you could Odin back to stock. Flash a good stable froyo and try to flash up from there.
I don't remember now if GB boot loader is 100% required but I have it on mine.
I'm getting ready to take an exam, if you haven't got it sorted before I return, I'll help you get running.
Thanks for the reply, I do have the gb bootloaders and I tried going back to stock and still no luck. I get a soft brick every time.
Sent from my SGH-T959 using Tapatalk 2
Which ICS ROM are you coming from, and are you doing full wipe?
I had a chance to think about it, and I had trouble getting up to 4.1 the first time I tried. I ended up stepping up gradually.
Odin'd to stock then went up to bionic, skipped GB, went up to latest CM ICS I believe... Then from there onto JB. Been fine since.
Its been a while but that's best as my memory cares to serve me.
I don't think its a real common problem, but occasionally something doesn't jive somewhere.
Hi,
Its not necessary BUT it will always work Odin back to stock and continuing. Once I tried to flash ICZen from FROYO but no luck. Then I ODIN back to stock then CM7 in the middle and ICS on top of it and it WORKED. I have flashed GB bootloaders to get easy key mapping (Anyway u have to flash it if it is required by the ROM) I have flahed JB 4.2.2 Avatar ROM on top of ICZen which has worked for me. woody has a [Guide] How to install ICS **EVERYTHING you need to know how to install them** so you can get an idea Sometimes you have to flash the ROM twice b/c CWM updation
Always do a CLEAN flash (FULL wipe) before flashing a new ROM
Hope u would get JB ROM flashed successfully
tc
Flash it twice
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testomat said:
Flash it twice
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Click to expand...
Click to collapse
Yes, this is good advice.

[Q] root and unlock problems

Hi, This question arises after much research and several kernel/rom combination attempts failing.
I have been having problems with the rooting/ROM flashing on several i777 lately. Obviously there are so many different ROMs and kernels. Mostly the ROMs I try are call "ROOTED STOCK ROMS" and custom kernels.
One observation I would really like to express is that NOTHING created by the dev. "ZEDOMAX" has EVER worked for me.!!!! Wiping/formatting, nothing. I have had problems ranging from non-booting to booting and running but overheating and rapid battery drain.
Also, seems as though this phone has lost the battle against age, in that all the custom dev. seems to be more than a year old, except for the UCMD8 that just came out. I also can't get that one to work. I reverted to ICS 4.0.3 mistakenly believing that the format/wipe step was safe unlike the 4.0.4 version which everyone warns against. Now I see that that is a problem for 4.0.3 as well, so I went with rooting 2.3.4 and tried to install GALAXSIMUNLOCK. It just won't install!!!
What to do now? This is exhausting.!!!
Interestingly, These phones still show LOTS of demand in the market whereas, The BEAUTIFULL pebble blue S3 with a brand new LCD/FRAME I have just sits there, no interest in it at all???
Any opinions would be GREATLY appreciated. Maybe 2.3.4 is too old for GALAXSIMUNLOCK???
Thanks
Try this apk...
http://forum.xda-developers.com/showthread.php?t=2130276
Sent from my SGH-I777 using xda app-developers app
GB 2.3.4
Teknodad1974 said:
Try this apk...
http://forum.xda-developers.com/showthread.php?t=2130276
Sent from my SGH-I777 using xda app-developers app
Click to expand...
Click to collapse
Apparently GB 2.3.4 is too old. I flashed a stock 4.0.4 ICS. Rooted, unlocked and updated to UCMD8. All is good!!!!
I also can't get UCMD8 rooted(cooked) rom to install for some reason it always turns out STOCK!!! very strange.
scm37 said:
Apparently GB 2.3.4 is too old. I flashed a stock 4.0.4 ICS. Rooted, unlocked and updated to UCMD8. All is good!!!!
I also can't get UCMD8 rooted(cooked) rom to install for some reason it always turns out STOCK!!! very strange.
Click to expand...
Click to collapse
Cooked is essentially stock. You won't notice much difference in the way it looks. But there are differences. It has AJK kernel instead of stock kernel, has root and busybox, is deodexed and has been debloated. You can check on any of those things to see if they are there. Boot into recovery, try a root application, use a root file explorer to look into the root files, etc.
Make sure you data factory reset and wipe cache and dalvik in cwm recovery. Reboot in to recovery and flash the cooked rom again. Make sure the rom download was not corrupt.
Sent from my SGH-I777 using xda app-developers app
Please don't ever call zedomax a dev again.
Sent from my Galaxy Nexus
Zedohack
Pirateghost said:
Please don't ever call zedomax a dev again.
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
He is a carnival act not a Dev....! He is a youtube boob..! Takes other peoples work and makes videos calling it his own..! A XDA Plagiarist...!
framaroot works!
Teknodad1974 said:
Try this apk...
http://forum.xda-developers.com/showthread.php?t=2130276
Sent from my SGH-I777 using xda app-developers app
Click to expand...
Click to collapse
Just wanted to thank the framaroot developer. I was able to use the first exploit, "Sam" on my wife's AT&T SGH-I777 GSII running 4.0.4. Now, onto a custom ROM!

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