[Q] Downgrade via ROMs? - Galaxy S II Q&A, Help & Troubleshooting

Hi, sorry if this question has been asked millions of times. I wanted to flash Paranoid Android ROM 2.21 and it's running on Jellybean 4.1.2. If I flash PA running 4.1.2 and I find a ROM I like running 4.1.1. can I just flash the rom normally? Or do I have to a whole bunch of things? Thanks

aandrewalv said:
Hi, sorry if this question has been asked millions of times. I wanted to flash Paranoid Android ROM 2.21 and it's running on Jellybean 4.1.2. If I flash PA running 4.1.2 and I find a ROM I like running 4.1.1. can I just flash the rom normally? Or do I have to a whole bunch of things? Thanks
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Click to collapse
As long as its the same android version, you'd just have to ensure you do a complete wipe and install the rom with its default kernel. To upgrade say from PA 2.16 to 2.17 you could (though advisable not to) simply flash without a wipe. But to downgrade, you'd have to.

HAXTREME said:
As long as its the same android version, you'd just have to ensure you do a complete wipe and install the rom with its default kernel. To upgrade say from PA 2.16 to 2.17 you could (though advisable not to) simply flash without a wipe. But to downgrade, you'd have to.
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Click to collapse
Soo say if I flased 2.21 from PA and wanted to go to Resurrection Remix running 4.1.1. I just flash it like I would any other rom?

aandrewalv said:
Soo say if I flased 2.21 from PA and wanted to go to Resurrection Remix running 4.1.1. I just flash it like I would any other rom?
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Click to collapse
yup. a full wipe and clean install should do it.

Related

[Q] moving from one rom 2 the other...

I have a s3 gt i9300 running on cm 10.1,4.2 based firmware.What i want to know is whether i can update or switch to a rom based on the 4.1.2 jb firmware such as paranoid android 3.54 from my present rom.Can i switch from a rom based on 4.2 firmware back to a 4.1 based firmware by simply updating/flashing like a normal rom???(i lost my backups so i cant restore)
g3oron said:
I have a s3 gt i9300 running on cm 10.1,4.2 based firmware.What i want to know is whether i can update or switch to a rom based on the 4.1.2 jb firmware such as paranoid android 3.54 from my present rom.Can i switch from a rom based on 4.2 firmware back to a 4.1 based firmware by simply updating/flashing like a normal rom???(i lost my backups so i cant restore)
Click to expand...
Click to collapse
Flashing its the same process, but a full wipe its highly recommended.
Sent from my GT-I9300 using xda app-developers app
chrismast said:
Flashing its the same process, but a full wipe its highly recommended.
Sent from my GT-I9300 using xda app-developers app
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Click to collapse
So i wont brick my phone if i simply flash again?
g3oron said:
So i wont brick my phone if i simply flash again?
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Click to collapse
obviously I can't tell you yes or no , as far as I know you can flash anything above anything, the question is if 1) it boots up or 2) if it boots up anything works without FC when you come from another rom base, hence the advise to do a full wipe

[Q] a simple question

for some reasons,i want to go back to 4.0.4 rom,right now i am on 4.1.2.lol yeah its kinda madness but just for miui rom wifi issue fix i have to come for 4.0.4 ics rom so thats the reason i want to go back.so all i need to do is simple full wipe and flash the rom?right?correct me if i am wrong.
adilliano said:
for some reasons,i want to go back to 4.0.4 rom,right now i am on 4.1.2.lol yeah its kinda madness but just for miui rom wifi issue fix i have to come for 4.0.4 ics rom so thats the reason i want to go back.so all i need to do is simple full wipe and flash the rom?right?correct me if i am wrong.
Click to expand...
Click to collapse
if you want a stock rom, you can flash jelly bean 4.1.2 from odin. if you want AOSP ROMs, you can flash CM10.1, Paranoid Android etc. if you want a rom based on stock rom, theres android revolution HD and Omega rom. go to the android development and original android development, you can find a lot of things there
TheMrcool212 said:
if you want a stock rom, you can flash jelly bean 4.1.2 from odin. if you want AOSP ROMs, you can flash CM10.1, Paranoid Android etc. if you want a rom based on stock rom, theres android revolution HD and Omega rom. go to the android development and original android development, you can find a lot of things there
Click to expand...
Click to collapse
brother i want to go back to 4.0.4
R: [Q] a simple question
adilliano said:
for some reasons,i want to go back to 4.0.4 rom,right now i am on 4.1.2.lol yeah its kinda madness but just for miui rom wifi issue fix i have to come for 4.0.4 ics rom so thats the reason i want to go back.so all i need to do is simple full wipe and flash the rom?right?correct me if i am wrong.
Click to expand...
Click to collapse
yes, you can do it, open recovery make full wipe and flash your favourite ron

[Q] I can't install a 4.1.2 ROM anymore?

So i have X-treme ROM which is android version 4.2.2, and i want to switch to OMEGA ROM which is samsung base 4.1.2. but it seems to stuck on the loading screen. and yes, i did wipe data and factory reset and cashe and dalvik cashe (sorry if i spelled that wrong). now im not asking that omega isnt working. (i would then go ask the developer) im asking that, does upgrading to 4.2.2 prevents to switch back to 4.1.2? because it didnt also happened to me with OMEGA, but with others ROMS that have sammy base. and i also tried to flash 4.1.2 with odin all new clear without any root and ROM. but didnt work. so, does 4.2.2 prevent me to switch back to 4.1.2?
I have the same issue. MIUIv5 is based on 4.1.2 stock too and it does boot up. I think you could give a shot restoring a stock rom and flashing rom from base
Flaff! said:
I have the same issue. MIUIv5 is based on 4.1.2 stock too and it does boot up. I think you could give a shot restoring a stock rom and flashing rom from base
Click to expand...
Click to collapse
I tried that too. didnt work

[Q] How to upgrade to Android 4.3

Hey there. I'm having trouble upgrading from Android 2.3.7 to 4.3. I want to use CyanogenMod 10.2 and at least according to the gapps download page you need 4.3 to use it. On the stock firmware my Wi-fi doesn't work and it won't let me update Android without being connected to it. In CM7, the WiFi works but I don't see an option to upgrade Android. Is there some way I can upgrade Android without being connected to Wifi, or some way from CM7?
Thanks.
rymonator said:
Hey there. I'm having trouble upgrading from Android 2.3.7 to 4.3. I want to use CyanogenMod 10.2 and at least according to the gapps download page you need 4.3 to use it. On the stock firmware my Wi-fi doesn't work and it won't let me update Android without being connected to it. In CM7, the WiFi works but I don't see an option to upgrade Android. Is there some way I can upgrade Android without being connected to Wifi, or some way from CM7?
Thanks.
Click to expand...
Click to collapse
I upgraded mine to 4.3 with supernexus 3 v.1. It's working fine. I did a clean install of 4.1.2 with ATT stock rom through Odin and then flashed Supernexus
junwuu said:
I upgraded mine to 4.3 with supernexus 3 v.1. It's working fine. I did a clean install of 4.1.2 with ATT stock rom through Odin and then flashed Supernexus
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Click to collapse
Thanks - can you tell me where to find a 4.1.2 stock rom? Or do I have to upgrade Odin Lite to do it?
Also, as a complete and utter noob, I'm just kind of confused as to what the difference is between flashing firmware through Odin versus using Clockwork Mod to install a ROM from SD card? Thanks.
rymonator said:
Thanks - can you tell me where to find a 4.1.2 stock rom? Or do I have to upgrade Odin Lite to do it?
Also, as a complete and utter noob, I'm just kind of confused as to what the difference is between flashing firmware through Odin versus using Clockwork Mod to install a ROM from SD card? Thanks.
Click to expand...
Click to collapse
http://www.android.gs/flash-android...d8-update-for-the-att-samsung-galaxy-s2-i777/
junwuu said:
...
Click to expand...
Click to collapse
EDIT:
Thanks for your help.
junwuu said:
I upgraded mine to 4.3 with supernexus 3 v.1. It's working fine. I did a clean install of 4.1.2 with ATT stock rom through Odin and then flashed Supernexus
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Click to collapse
where is supernexus 3 v1?
mrprince123 said:
where is supernexus 3 v1?
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Click to collapse
http://forum.xda-developers.com/showthread.php?t=2407458
Sent from my GT-p511x

[Q] Should I upgrade EFS?

Hi,
I'm currently running Paranoid 3.97 (I think), but the phone is currently acting up. I'm stuck in the loading screen, so I thought perhaps I could use the chance to flash a more recent rom. I can't remember the exact baseband version, but it uses "EFS 1".
When flashing newer roms, such as Temasek's 4.4 or CM10.2 stable, would I have to upgrade to EHF 2 first? If so, would I need to flash a stock rom first, so as to upgrade the EFS, and then flash a new baseband (if not already included in the stock rom)?
If I don't have to, are there any real benefits of doing so? Or should I just use the EFS and baseband I am currenly on and forget about it?
If no to the above; would it make sense to flash the latest stock rom anyways (I guess 4.1.2 with EHF2) or is that just a waste of time?
Thank you in advance for any assistance!
AndyGizzle said:
Hi,
I'm currently running Paranoid 3.97 (I think), but the phone is currently acting up. I'm stuck in the loading screen, so I thought perhaps I could use the chance to flash a more recent rom. I can't remember the exact baseband version, but it uses "EFS 1".
When flashing newer roms, such as Temasek's 4.4 or CM10.2 stable, would I have to upgrade to EHF 2 first? If so, would I need to flash a stock rom first, so as to upgrade the EFS, and then flash a new baseband (if not already included in the stock rom)?
If I don't have to, are there any real benefits of doing so? Or should I just use the EFS and baseband I am currenly on and forget about it?
If no to the above; would it make sense to flash the latest stock rom anyways (I guess 4.1.2 with EHF2) or is that just a waste of time?
Thank you in advance for any assistance!
Click to expand...
Click to collapse
AOSP roms do not touch modem/baseband and efs.
You'll fine.
"Trouble" lies in stock roms newer than MG4 (inclusive)
Thank you for clarifying.
Would there otherwise be any benefits of upgrading EFS and baseband?
AndyGizzle said:
Thank you for clarifying.
Would there otherwise be any benefits of upgrading EFS and baseband?
Click to expand...
Click to collapse
None at all.
Allright, thanks again. I'll let it be, then!

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