Will my phone get locked if I install custom rom? - Android Q&A, Help & Troubleshooting

I am about to install a custom rom, but I was wondering if this will lock my phone in my country, because I have seen in other thread about how to flash back my stock rom to get my warranty back here: http://forum.xda-developers.com/showthread.php?t=2505436
And he listed a firmware for some specific countries(which mine isn't listed), why? Sorry I'm a noob on this subject.

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[Q] Custom ROM vs stock ROM

Hi people,
I've been reading up on flashing custom ROMs and might be interested to start using those on my rooted X10.
Question is though, can I easily go back to stock ROM in case I need to claim warranty?
I'm guessing by updating through PC Companion or SEUS, but I want to be sure first.
I couldn't find the answer in the forums, although I read quite intensively through the first pages of the dev & hacking forum.
Don't flame me, I've got my Android several months now but still consider myself a newbie, coming from WinMo...
Its easy to flash back to the original firmware with the flash tool. So if you wanna install a custom rom go right ahead.
Do I need to have the stock ROM at my disposal? Cause I can't find it for my carrier...
Yup. It's very easy to get back to stock firmware if you got an unlocked model.
However, if you are on a branded X10, you gotta find your exact branded version.
You can probably used the search button to find it though.
Moved as not android development

[Q] Reverting to Stock ROM

Okay guys, I'm in real need of your help here, whether it's a proper answer or some sarcastic link to the correct thread.
I've been testing out roms all over, and different kernels, but now I want to revert back to stock so I can start afresh. Ideally I just want the stock rom. I'm happy running an unsigned (rooted) kernal, but I do want the stock rom.
I'm in the UK, and my phone wasn't branded with any carrier.
Someone, help!
http://forum.xda-developers.com/showthread.php?t=1075278
read the first page completly then ask question and you will be helped
in a nut shell...
1: get odin
2: get stock rom
3: flash using download mode.
Hi.
I have Odin, and have used it.
I have used download mode to install a rom.
What I can't find is a stock rom.

How to revert to stock firmware.

I have searched everywhere to find out how to stop kies telling me my phone cannot be upgraded. I have also read that this is due to me having installed a custom rom at one point and wanted to know how to revert to a completely stock factory shipped version so I can then update my phone via kies.
I have checked most threads and they all link to the thread with the list of custom roms, but as a newbie to this that doesn't help. What rom version do I need to be able to update via kies. My phone was bought unlocked from Phones4You.
All the info is there.. Any questions ask in the thread of subject.
http://forum.xda-developers.com/showthread.php?t=1426109&highlight=revert+to+stock+rom
Another locked thread.

[Q] i9300 Stock ROM (Australia)

Hey guys, got my S3 here, and need to flash it back to the stock rom due to selling it.
The buyer knows its rooted, its currently running CM10
All that i need to do is flash it back to stock, no un-rooting, triange away or any of that stuff.
Where can i find the stock rom for Australia? already checked the stickys and threads with all the stock roms, but they have almost every other country.
Is flashing the stock rom the same way as doing a custom (after the rooting?)
Done heaps of custom roms on >5 phones, but this is the first time going back
TLDR, i9300 Australian phone, VODAFONE. Need to flash back to stock rom, but dont need to unroot, currently on CM10
Thanks
EDIT: Someone else posted an almost identical thread to me, 6 min before this one. Ill copypaste this to that thread, thanks
Muchoman1 said:
Hey guys, got my S3 here, and need to flash it back to the stock rom due to selling it.
The buyer knows its rooted, its currently running CM10
All that i need to do is flash it back to stock, no un-rooting, triange away or any of that stuff.
Where can i find the stock rom for Australia? already checked the stickys and threads with all the stock roms, but they have almost every other country.
Is flashing the stock rom the same way as doing a custom (after the rooting?)
Done heaps of custom roms on >5 phones, but this is the first time going back
TLDR, i9300 Australian phone, VODAFONE. Need to flash back to stock rom, but dont need to unroot, currently on CM10
Thanks
EDIT: Someone else posted an almost identical thread to me, 6 min before this one. Ill copypaste this to that thread, thanks
Click to expand...
Click to collapse
samfirmware.com/
You should've asked this in Q&A or Australian Galaxy S3 thread...anyway here is the link for latest JB stock ROM for Vodafone AU. Flash it with Odin in PDA
www.hotfile.com/dl/185215375/bb3b898/I9300TDUDLK3_I9300TVAUDLK3_VAU.zip.html
Sent from my GT-I9300 using xda app-developers app
Thanks man, you're a legend!

Extracting factory roms

Hi all,
This is my first post, so please dont be mad if I posted in the wrong section.
I am new to the android modifing. I recenty started installing custom roms, kernels and overclocking.
For now, its going pretty well. I just cant find something that I'm intrested in, so I decided to ask here.
Sometimes I cant find stock firmware for phones. I tried on sammobile.
Is there a way to extract factory rom and kernel from phone before I flash custom rom?
That way I can return from custom to factory rom in very quick time if i need it.
Sorry for my bad English.
All the best.
pkneca

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