Best way to flash back to stock rom? - Galaxy S II Q&A, Help & Troubleshooting

What would be the best way to go from any custom rom back to a stock rom. Wipe data, cache, dalvik cache in recovery, the shut down phone and flash stock rom via odin? Or should I also wipe system before flashing?
Thanks!

Lownita said:
What would be the best way to go from any custom rom back to a stock rom. Wipe data, cache, dalvik cache in recovery, the shut down phone and flash stock rom via odin? Or should I also wipe system before flashing?
Thanks!
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You don't need to do any wipes through CWM if you are going to be flashing a stock Odin rom, odin automatically takes care of all that stuff. You can just boot your phone into download mode as is and flash the odin rom.
Regards.
Btw, your title is a bit misleading/ confusing? Aha, you ask "best way to flash back to custom rom" ??

Yes that was indeed a bit misleading, corrected!

Related

From 2.2 to 2.3.4

I have a question. I want to switch from Megatron rom(2.2) to void.#forever(2.3.4)
Do i only have to flash the rom or do something before this?
minu94 said:
I have a question. I want to switch from Megatron rom(2.2) to void.#forever(2.3.4)
Do i only have to flash the rom or do something before this?
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Click to collapse
FOrmat System and Wipe Data ofc xD
just to be safe, make a backup in recovery before you do anything. then, wipe data/factory reset, cache, and dalvik cache. after you finish this, you can flash the rom

Updating to new firmware/kernel

Hey all so after I update my firmware to XWKK5 do I have to wipe everything while in recovery mode is it really necessary?
What do you want to achieve with deleting all from recovery?
If you've upgraded, then the phone is in the version upgraded. If you delete all from recovery, you have to reinstall the entire ROM or the phone wont boot...
Thought I had to Wipe Data / factory reset and Wipe Cache Partition?
RoRo1990 said:
Thought I had to Wipe Data / factory reset and Wipe Cache Partition?
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Click to collapse
Instructions are to be followed .
Custom roms usually ask for wipe but not stock roms .
jje
RoRo1990 said:
Hey all so after I update my firmware to XWKK5 do I have to wipe everything while in recovery mode is it really necessary?
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Click to collapse
You don't need to do that if you are upgrading from a Stock ROM. If you chose the wipe version of ROM for flashing then it'll automatically wipe you device. If you use non-wipe it'll upgrade and everything remains same.
Wipe is only recommended when you are switchin from Custom to Stock or vice-versa else after a version downgrade say KK5 to KJ3.
Hope it helped.

[Q] How to remove a ROM so I can flash with a different ROM?

I flashed my S2 yesterday with CheckROM and I like it and everything but I'd like to try MIUI today but I'm not sure how I would go about this? I think I may have to wipe my phone (already have a backup from before I flashed with CheckROM) and then just install MIUI like I did CheckROM? Correct me if there is another way or I'm wrong.
Just go into clock work recovery, wipe data cache, flash miui.
Sent from my GT-I9100
MKULTRA- said:
I flashed my S2 yesterday with CheckROM and I like it and everything but I'd like to try MIUI today but I'm not sure how I would go about this? I think I may have to wipe my phone (already have a backup from before I flashed with CheckROM) and then just install MIUI like I did CheckROM? Correct me if there is another way or I'm wrong.
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Click to collapse
Wipe cache and Wipe Dalvik cache in recovery then flash your rom .
OR
...................................
Clean Slate for those that balls up the firmware .Or need to return to service or decide if its hardware/firmware problem .
Backup data first if phone is working .
Boot CWM recovery
Mounts and Storage
Format cache data system sd card .
Remove battery
Boot to download mode
Open Odin
Install correct stock firmware .
jje
Miui formats system for you.
Sent from my GT-I9100
atifsh said:
Miui formats system for you.
Sent from my GT-I9100
Click to expand...
Click to collapse
By formats system do you mean wipes everything or just cache?
Let's see.......
You wipe data, cache but your phone can boot, because the OS remains.
You wipe system OS got removed, you can't boot phone.
Wiping system is the cleanest flash you can do.
Sent from my GT-I9100

Help! installing custom ics roms

Hello, im having trouble getting any custom ics rom to boot after flashing any custom ics kernal, I can flash a custom kernal and load up stock ics rom but then as soon as I flash a custom rom I get stuck on the boot animation screen and the rom doesnt boot up. Does anyone have any suggestions why its doing this? its rather annoying being stuck on cm7 when ics is the way forward. Ive tried every custom ics rom and kernal and the only one that works is stock, my bootloader is unlocked, ive ran out of ideas.
if u wana flash a custom rom first flash kernel and then flash custom rom by cwm. and make a full data wipe-factory reset
and also Wipe cache and Dalvik cache before flashing the rom
ironzy said:
Hello, im having trouble getting any custom ics rom to boot after flashing any custom ics kernal, I can flash a custom kernal and load up stock ics rom but then as soon as I flash a custom rom I get stuck on the boot animation screen and the rom doesnt boot up. Does anyone have any suggestions why its doing this? its rather annoying being stuck on cm7 when ics is the way forward. Ive tried every custom ics rom and kernal and the only one that works is stock, my bootloader is unlocked, ive ran out of ideas.
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Click to collapse
Hey,man.
Since you've unlocked your bootloader,I think you are able to flash any custom roms successfully.
So,did you fully wipe after flash the kernel?
take FXP rom for example:flash boot.img inside the zip -> go to CWM and fully wipe , install the rom -> reboot and enjoy.
Before flashing a rom, you are supposed to wipe data, wipe cache, and wipe dalvik cache. If you are flashing roms like ExMIUI or MiniCmSandwich you will also have to wipe system.
Sent from my MiniPro using xda app-developers app
Im not new to installing custom roms, I know the procedure in installing a custom rom, the problem is no custom ics rom boots up using any custom kernal.
ironzy said:
Im not new to installing custom roms, I know the procedure in installing a custom rom, the problem is no custom ics rom boots up using any custom kernal.
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I do not know if this will work or not, but you can try flashing stock FTF file for your device and then go through the procedure of flashing kernel and rom again.
do wipe data, wipe cache, and wipe dalvik cache then go to mounts and storage and do format system
believe me I have tried everything and nothing works, cm7 works fine with a custom kernal so I dont know what the problem could be.
ironzy said:
believe me I have tried everything and nothing works
Click to expand...
Click to collapse
Did you follow the instruction:
1. flash kernel
2. go to cwm and do wipe data, wipe cache, and wipe dalvik cache then go to mounts and storage and do format system + delete from sd card all folders and files with dots
3. flash rom (if rom has the aroma installer follow the aroma instructions)
4. reboot phone (first boot is up to 10 minutes

[Q] How to format /system without Custom Recovery??

Hi there,
Now my device has the ELLA rom flashed (anyway, I'm thinking about flash the recent ELLC spanish rom)
I have rooted by CF-Root (not CF Auto root) so my counter is not zero , and the red mark is there.
I want to be "official" so my idea is not to flash a custom recovery.
I am going to use Triangle Away and to flash again the Rom with Odin.
Then I will root with CF-Autoroot.
Now, here is my problem: how to make the things that I made with a Custom Recovery, without a Custom Recovery.
- Flash .zip files -> I think I can use Mobile Odin
- Backup / restore -> Maybe Titanium Backup would help
- Wipe Data and wipe Cache -> Stock recovery is ok for this.
- Wipe Dalvik and format /system -> Any suggestions??
I am thinking about non-permanent custom recoveries, or even in a Custom Recovery that does not increase the counter...does it exist?
Many thanks for your help!!
Stock recovery can't replace a custom one.
You can't flash zips with Odin. AFAIK you can't wipe cache from stock recovery.
The only way to have the counter at zero is not to change anything
Glebun said:
Stock recovery can't replace a custom one.
You can't flash zips with Odin. AFAIK you can't wipe cache from stock recovery.
The only way to have the counter at zero is not to change anything
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Click to collapse
I thought that stock recovery allows to wipe data and wipe cache (cache , not dalvik)
Then .. Is there NO way to format /system without change stock recovery?
Thanks
skorzo said:
I thought that stock recovery allows to wipe data and wipe cache (cache , not dalvik)
Then .. Is there NO way to format /system without change stock recovery?
Thanks
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Why do you need to wipe system?
Glebun said:
Why do you need to wipe system?
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Click to collapse
Yeah, a data wipe is basically a system format.
Aside that, there is no such thing as a system wipe unless you want to delete your efs and all important files.
Sent from my GT-I9300 using xda app-developers app
Glebun said:
Why do you need to wipe system?
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I think it is the best way to have a really clean Rom, without stuff from the oldest rom.
When I dont format /system sometimes I can find apps and stuff from the oldest rom, so I think that the new rom is not really fresh.
Thank you
kofiaa said:
Yeah, a data wipe is basically a system format.
Aside that, there is no such thing as a system wipe unless you want to delete your efs and all important files.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Data wipe does not format /system
And formatting /system does not wipe Efs ...
You can't wipe system from stock recovery. Here's your answer
---------- Post added at 01:30 AM ---------- Previous post was at 01:28 AM ----------
The solution would be to wipe /system from CWM, then flash flash a stock ROM with stock recovery
Glebun said:
You can't wipe system from stock recovery. Here's your answer
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Click to collapse
Yes, I am pretty sure. It is not possible from stock recovery.
But I was wondering if I can format /system with an alternative method like ADB, non permanent recovery, etc.
Thanks , and please excuse me if I am stubborn
skorzo said:
Yes, I am pretty sure. It is not possible from stock recovery.
But I was wondering if I can format /system with an alternative method like ADB, non permanent recovery, etc.
Thanks , and please excuse me if I am stubborn
Click to expand...
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The solution would be to wipe /system from CWM, then flash flash a stock ROM with stock recovery
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VERY good idea!!
I will flash custom recovery only when I need to flash a new stock Rom.
Perfect
Glad I helped

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