Rom flashing - Galaxy S II Q&A, Help & Troubleshooting

Hi I want to flash to the latest firmware but my current Rom is branded. I read on a website if you flash an unbranded Rom to a branded Rom it bricks your phone. Is this true or is it just as simple as downloading the latest firmware and flashing via ordin ?
Any help is highly appreciated
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it is simple as dwnloading and flashing. but make sure you read and understand.

Also do not include the .pit file when you flash, bad things can happen

Thanks for the help
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Related

[Q] S5830DXKC1 to S5830DXKPD Flashing

Just a question guys.
Do its possible to flash stock froyo 2.2.1(S5830DXKC1) to S5830DXKPD using ONE PACKAGE File? Cause there are some cases that you need flash full package first before you can flash on a One Package file.
Please help to verify. Thanks in advance.
If you're upgrading , it's okay
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Sgs2 unlock/root and unroot/stock ROM update?

Hi..i have a Three UK network phone which i have unlocked using method described on xda...however I'd like to debrand it by installing another ROM and unroot...will i lose the unlock in this process?
Also, if i downloaded ROM from samfirmware, how can i apply using odin as there are a few files included? I'm not very technical when it comes to various intricacies of Android ROMs!
As always thanks for your help in advance...
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No.
Stock roms are in dev section.
jje
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Thanks jje..if you could give me a clue or tip on what stock/debranded firmware i should use for UK that would be much appreciated as i get confused with the list and cannot make my mind..thanks again..
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http://forum.xda-developers.com/showthread.php?t=1075278
You can flash any firmware you like, and later a csc to match UK or just enter the APN settings manually. XX UK or XE/XW European etc, but as I said, doesn't really matter. For best data speed, connection etc you need to then flash a modem that best suits your carrier. Best to just try.
For the latest modems, some flashable via Odin and in CWM recovery:
http://forum.xda-developers.com/showthread.php?t=1131950
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Excellent...thanks very much...
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questions on rooting and firmwares

say I'm using a ALF6 fw on my phone with CF root, am I able to flash a rom based on other firmwares? or do i have to flash to official FW and root and have it flash to the rom?
tyrtok said:
say I'm using a ALF6 fw on my phone with CF root, am I able to flash a rom based on other firmwares? or do i have to flash to official FW and root and have it flash to the rom?
Click to expand...
Click to collapse
You can flash any rom on top of your current setup unless mentioned otherwise in rom installation instructions
if it says "[ROM][XXBLG1][12Jul][V1.6] WanamLite Smooth,Stable & Battery Friendly" do i need to have XXBLG1 firmware or it means it is based on XXBLG1 firmware or any other FW unless stated otherwise?
You will just have that modem when you flash. If the modem isn't good for you u can flash another
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Thank watsa he answered your question mate. It is fine.
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thanks!

SII I9100 rooted OTA update

Hey Galaxy SII people, I need some help with a friend's SII.
I'm quite knowledgeable with custom ROMs and recoveries, but I have no idea what to do with a stock phone.
The phone is rooted and not getting the OTA to ICS. I want to get the OTA, losing root not necessarily a problem.
Can someone give me a hand with this? I have no idea what I need to do.
The phone also has the stock recovery.
I apologize if this has been asked before, but I couldn't find a conclusive, comprehensive answer.
Go to samfirmware and download the update firmware and install it via odin.
All the best.
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Flash stock ROM from http://samfirmware.com/ via Odin. Search for galaxy S2 ROMs, just make sure you don't download the dangerous ROMs (the ones with a warning triangle next to them).
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HANDSY said:
Go to samfirmware and download the update firmware and install it via odin.
All the best.
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Click to expand...
Click to collapse
Spiralzz said:
Flash stock ROM from http://samfirmware.com/ via Odin. Search for galaxy S2 ROMs, just make sure you don't download the dangerous ROMs (the ones with a warning triangle next to them).
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Click to expand...
Click to collapse
Thanks for the quick reply.
I'm downloading a zip now. I flash this with Odin/Heimdall? I thought I needed a .tar and a bunch of other files to flash with Odin.
This won't keep root, right? Is there any way I could get root back after flashing?
Also, will this wipe /data?
Oh, and I have the option to download a ROM for a specific carrier. Does that mean I can't use another carrier?
Edit: While I'm at it, is the stock recovery needed for anything stock ROM related?
Yes download will be in the form of a zip file, once downloading is complete you can extract the tar. file and place in the PDA section of odin. This will not wipe your device, well never has done for me. Yes you will loose root as you have a completely new rom with stock kernel. See the guide for rooting your chosen firmware. As for the carrier i always use the unbranded /open version as this has less bloat ware. All the best.
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Make sure you don't have repartition button ticked or play with the pit file if you don't 100% know what you're doing either
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Flashing stockrom from a different country?

Hello, I would like to ask something.
I knew that recently Samsung has released 4.3 update for Samsung Galaxy SIII International Version. The 4.3 update hasn't reach my country yet. I would like to know is it possible for me to flash another country's official frimware? Is there any negative effects?
Meanwhile, if I flash the latest stock rom back to my phone, will it be unrooted?
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Yes, you can flash a rom from another country -which includes a modem for another country. If the modem is unsuitable you will lose signal strength or even all connection.
Of course if you flash an unrooted stock rom then your phone will be unrooted, that's the whole point.
Unless you are confident in flashing modems and kernels I would not advise using 4.3 yet -it isn't reliable unless you can replace both.
Thanks for the quick reply
In that case, is it possible to flash just the ROM without the modem/baseband? (SamMobile ROMs come with seperate PDA, Modem)
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If your current baseband is EMGx or later then yes, you can flash just the rom.
Alright.
Thanks for your help
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