[Q] Need Help, How to recover ALL?! - Vibrant Q&A, Help & Troubleshooting

What's up guys,
I looked everywhere and I couldn't find the exact answer I needed. I'm relatively new to the Android modding scene. My problem is that I am unsure of how to restore all my stuff (mainly all my apps, etc.) after flashing Eugene's Dead Horse ULF OC/UV kernel.
- I have flashed = Bionix V, KA7 modem, and the Dead Horse kernel (above)
I did a backup of Bionix V via Rom Manager and also backed up all my apps and data via Titanium Backup (I had a successful Ti backup right after I flashed Bionix). However, I didn't do a Nandroid backup of my stock 2.1 rom/things before Bionix. I JUST NEED HELP RESTORING ALL MY STUFF, PLEASE - still currently on the things flashed ABOVE. I backed up my internal SD on my computer and transferred it back after flashing Dead Horse kernel (flashing this DID wipe my internal SD).
Disabled Voodoo lagfix by creating "disable_lagfix" file in Voodoo folder (successful, followed all the correct procedures).
Now, the Android Market market is missing and I cannot access Rom Manager or Titanium backup. I have tried a Factory Reset (didn't work).
I can see all my backups in the Files app but do not know what to do!
Any help is appreciated! THANK YOU!

Try re-flashing the rom from CWR. You may just have had a bad download.

I would odin back to stock (jfd or the Alt Method, noob guide)
then flash something stable
Then move folders from pc to phone
Then restore like normal.
If the noob guide doesn't cover it, pm me

Hey, thanks for replying! I have been following your noob and downloaded everything you recommended for this process. However, while using Odin, it seems to have gotten stuck on the "All threads completed. (succeed 0 / failed 0)" part --> it's been almost 10 min and my Vibrant is still in Download mode.
What should I do?

I realized that Odin was not able to recognize my Vibrant. I have been searching for hours and cannot find a solution. I installed the Samsung drivers from their support page; are there different drivers for Odin?
Phone is NOT bricked. I can still get into Download mode and Recovery Mode (not stock)
Still on Bionix V and, again, no access to the Market or previous backups.
Thanks!

bfranksd said:
I realized that Odin was not able to recognize my Vibrant. I have been searching for hours and cannot find a solution. I installed the Samsung drivers from their support page; are there different drivers for Odin?
Phone is NOT bricked. I can still get into Download mode and Recovery Mode (not stock)
Still on Bionix V and, again, no access to the Market or previous backups.
Thanks!
Click to expand...
Click to collapse
Have you tried using the toolbox?
http://forum.xda-developers.com/showthread.php?t=954509

I just created a thread with the link to the drivers.. Called "drivers 32/64" if you want to search.
Once the drivers are installed odin should recognize it. If you were on some rom like cm7, you nee red the nexus s drivers.

THANK YOU! Everything helped and i figured out that I had to reinstall Samsung Kies. I appreciate all the help and suggestions, really.

Related

[Q] Used Clockwork to backup Vibrant, flashed a new ROM, then changed my mind

I had zero problems when rooting and flashing my G1, but now with my Vibrant I am not sure what I did.
A few excellent stickies at the top but I seem to not be making any progress.
Here are the steps I took.
I had a stock Vibrant running 2.1
I downloaded ROM Manager, installed clockwork mod.
Did a backup of my current system ( was I supposed to do a clockwork AND nandroid?)
Downloaded and successfully installed a ROM called Blackhole 1.0
it runs ok but didn't give me the option to switch from 3G to EDGE data, and then I couldn't get internet access at all so i decided to restore my original stock vibrant system.
So I rebooted into recovery, selected restore (my phone won't go into recovery anymore for some reason) and waited, it took a while, then I rebooted (forgot to wipe), but it just got stuck on the Vibrant screen. So I booted into recovery mode again and wiped just user data not cache and rebooted, same thing stuck at Vibrant.
Now i keep hearing about something called ODIN, what I can tell it is some kind of flasher program for ROMS, nobody seems to give any kind of link or anything, is it greymarket or something?
So where am I now? I think the excellent noob guide needs to be updated a bit more.
My phone can get into download mode (whatever it is for i don't know) but it won't get into recovery mode anymore.
Everything you need is here: http://forum.xda-developers.com/showthread.php?t=771111
i think what happened to you is you flashed a 2.2 ROM then tried to revert back to 2.1 without doing the proper downgrading steps i.e. you did not flash a 2.1 kernel first.
but since you can get to download mode.. just flash stock JFD or JI6 through ODIN and you should be good.
good luck
Once you get back to stock don't give up on the 2.2 toms. Try axura or nero. They might have a few minor bugs but its way better then stock 2.1.
Powered by Axura with a dash of Voodoo
I have done the samething as you, coming from a nexus one it seemed easier to flash roms without worrying about downgrading kernels or what not. Recently I was on Nero froyo and flashed to a different rom, and tried to revert back but ended up stuck at the vibrant screen. Think it has something to do with voodoo lag.
Anyways I had to use Odin with the no brick froyo off ebproductions. Ran that and uploaded clockwork, reinstalled voodoo lag fix and was able to nandroid back to my Nero set up. Somewhat of a pain but once you've done it, no need to worry about bricking
xtone said:
Everything you need is here: http://forum.xda-developers.com/showthread.php?t=771111
i think what happened to you is you flashed a 2.2 ROM then tried to revert back to 2.1 without doing the proper downgrading steps i.e. you did not flash a 2.1 kernel first.
but since you can get to download mode.. just flash stock JFD or JI6 through ODIN and you should be good.
good luck
Click to expand...
Click to collapse
So the steps that are in this page?
http://forum.xda-developers.com/showthread.php?t=734475
GreggoryD502 said:
Once you get back to stock don't give up on the 2.2 toms. Try axura or nero. They might have a few minor bugs but its way better then stock 2.1.
Powered by Axura with a dash of Voodoo
Click to expand...
Click to collapse
Well as long as I can use Odin if I f-up royally like above then I might give it a shot.
Need to read about downgrading kernals or whatever. Might just wait for Cyanogen 6.1
Just so you know, the backup utility in Rom Manager (clockwork) is really just shortcut to a nandroid backup.
The way I have things set up for backups, and this is just for my personal convenience, is as follows...
I have a stock JFD ODIN rom to flash in case anything goes wrong. (A lot of people here will tell you to flash this whenever flashing a new rom. It is safer, and cleaner to do it this way, but not absolutely necessary)
I make a nandroid of my last stable rom (I only keep one at a time cause the files are huge) and keep a backup of that on my PC.
I backup all my apps and a few other things (call logs, bookmarks, sms) through Titanium backup. If you get the pro version, you can load it up after flashing a new rom and have it automatically restore all your apps in one click (system settings can be dangerous to restore when going from rom to rom, so be careful with those.) I also keep a backup of this on my PC.
I will also occasionally backup both of the sd cards to the PC.
Maybe overkill, but you probably wont ever lose anything forever.
thegreatcity said:
Just so you know, the backup utility in Rom Manager (clockwork) is really just shortcut to a nandroid backup.
The way I have things set up for backups, and this is just for my personal convenience, is as follows...
I have a stock JFD ODIN rom to flash in case anything goes wrong. (A lot of people here will tell you to flash this whenever flashing a new rom. It is safer, and cleaner to do it this way, but not absolutely necessary)
I make a nandroid of my last stable rom (I only keep one at a time cause the files are huge) and keep a backup of that on my PC.
I backup all my apps and a few other things (call logs, bookmarks, sms) through Titanium backup. If you get the pro version, you can load it up after flashing a new rom and have it automatically restore all your apps in one click (system settings can be dangerous to restore when going from rom to rom, so be careful with those.) I also keep a backup of this on my PC.
I will also occasionally backup both of the sd cards to the PC.
Maybe overkill, but you probably wont ever lose anything forever.
Click to expand...
Click to collapse
OK I will just do the long way from now on. I use this phone on AT&T, I was worried that I flushed $500 down the toilet but ever since i modded my first phone way back in the day i've been addicted.
Running Odin and my phone is in download mode, about to flash this b**ch.
wish me luck.
I flashed Odin on my phone to revert to stock. Re-Rooted it but now I can't flash Clockworkmod. Please help D:
use the update.zip posted here. You want B.

Help re-rooting my phone through Clockworkmod

So basically what happened here was things went wrong. And I accidently Unrooted my phone The Samsung Galaxy S Vibrant
Which is running GingerR2 on 2.2 I want to install another rom, but can't
I do have Clockworkmod recovery installed I got this phone second-handed so from what I tried there doesn't seem to be a backup
Is there a way to do this or instructions I can follow?
I have searched the forums and can't find anything really related to this and if there was something I apologize for not noticing.
Have tried Z4root it just closed itself after a certain period and phone didn't restart
Tried one click root
Even the option in the recovering for running the SD card won't root it
Thank you kindly for your answer
Just download the cw recovery update.zip and flash it in normal recovery (reinstall packages) twice on the second reinstall it will put u in cw recovery (green font) use it to flash a new rom because they all come rooted.
Any more questions email me cuz I don't get here too much anymore. I will PM u my email
Use AIO Vibrant tools on development area. Its a good tool, It does all you need on ur vibrant including rooting. That's what I am using.
http://forum.xda-developers.com/showthread.php?t=954509

[Q] Bricked Phone from MIUI

Hey guys
I flashed my phone with the latest MIUI ROM with Rom Manager, and now I'm stuck in a soft brick. It gave me an error when I tried flashing the ROM, and when I try restarting the phone, it is just stuck in the Vibrant boot screen. I went into the recovery and tried flashing my backups and doing a full backup recovery, but nothing works. I can't mount either the sdcard or the external sdcard, it gives me the error (device busy). Also, I can't seem to mount into USB, and I can't mount anything on principle, even if it was mounted before and I unmounted it. Is my phone toast?
you HAVE to odin to stock JFD first. it's been explained and exclaimed MANY times in the CM7/MIUI threads. the recovery on 2.3 does not work with nandroids made using a 2.xxx CWM recovery (GB has to CWM v 3 or higher).
Also, there is a different partition type using CM7/MIUI that isn't cmpatible with the stuff samsung uses.
tl;dr: ODIN to JFD and the flash your roms/nandroids.
can't find any working JFD links online, or the files needed for ODIN.. anyone got a link?
OK, cool, finally got ODIN to work, phone unbricked, thanks!
OK, but if I follow the instruction for MIUI, it says that I need to start with a 2.2 ROM. I was using bionix. Is Bionix fine to start with as long as you follow the other instructions?
geoffcorey said:
you HAVE to odin to stock JFD first. it's been explained and exclaimed MANY times in the CM7/MIUI threads. the recovery on 2.3 does not work with nandroids made using a 2.xxx CWM recovery (GB has to CWM v 3 or higher).
Also, there is a different partition type using CM7/MIUI that isn't cmpatible with the stuff samsung uses.
tl;dr: ODIN to JFD and the flash your roms/nandroids.
Click to expand...
Click to collapse
Could you elaborate on this or point to a source? I'm not at all doubting your credibility, it's just that I've been having signal issues that I'm can only hope are software-related (it's all spelled out in this thread). I've used Odin to flash JFD (official), JK2 (official), and Eugene's 'Froyo that doesn't brick' dozens of times in the past 2 days and I'm still not able to get any AT&T signal. I know my SIM is fine, as well.
One of the JK2 installs I had kept constantly giving RIL reset messages.
Or were you talking about the different FS format used in CM7 vs rfs/ext4?

[Q] Clockworkmod recovery problem...

Hi, stupid question here from a relative noob....
I have a Cincinnati Bell Vibrant, that I recently flashed CM7 on (after using Rom Manager to backup up my stock rom). Liked it, but found it too battery-intensive, so I booted into clockworkmod recovery and attempted to restore the backup of my stock rom. It failed on flashing the boot image, and now my phone is stuck on the Vibrant screen, and won't boot. None of the hardware combinations to get into recovery mode are working, but I can get it into download mode. Before I screw things up further, what is the best way to go from here to get the backup restored, or is it even possible at this point?
Thanks
tabbott01 said:
Hi, stupid question here from a relative noob....
I have a Cincinnati Bell Vibrant, that I recently flashed CM7 on (after using Rom Manager to backup up my stock rom). Liked it, but found it too battery-intensive, so I booted into clockworkmod recovery and attempted to restore the backup of my stock rom. It failed on flashing the boot image, and now my phone is stuck on the Vibrant screen, and won't boot. None of the hardware combinations to get into recovery mode are working, but I can get it into download mode. Before I screw things up further, what is the best way to go from here to get the backup restored, or is it even possible at this point?
Thanks
Click to expand...
Click to collapse
This doesn't sound too bad. Basically you want to Odin back to stock. Then reflash the rom you were on, then you can reboot back into recovery and restore your backup. If voodoo was enabled on your backup make sure voodoo is enabled again before restoring(it might work either way, but I'm not sure). When I've done this, I restore a prerooted 2.2 stock Rom without changing the bootloaders, but almost any official stock rom will also work. I'm on the go, so I don't have a link handy, but post back if needed and I will point you to the odin package I use. Good luck.
I also am having some issues with Clockworld recovery. The problem i am having is that when doing a nandriod backup this is the error i am recieving
"E:cant mount /dev/block/mmcblk1p1 (or @)
Cant mount /mnt/sdcard
any suggestions on whats going on?
phone_noobie said:
I also am having some issues with Clockworld recovery. The problem i am having is that when doing a nandriod backup this is the error i am recieving
"E:cant mount /dev/block/mmcblk1p1 (or @)
Cant mount /mnt/sdcard
any suggestions on whats going on?
Click to expand...
Click to collapse
Are you sure the sdcard is good? If so then I would follow the same steps listed above, that way you know your CWR is good.
mattb3 said:
Are you sure the sdcard is good? If so then I would follow the same steps listed above, that way you know your CWR is good.
Click to expand...
Click to collapse
yes it is good because i can see all the videos, pics i have saved in it. Also i put the new ROM on my internal sd card and its there so sd card is def good. What could be causing the problem?
To the op, I would use Odin, no real worries there.
To the other guy with sdcard issue, try moving all files to your PC, format your sdcard, reboot, move files back, flash cwr in ROM mgr, backup work? Move critical files back from PC.
mattb3 said:
This doesn't sound too bad. Basically you want to Odin back to stock. Then reflash the rom you were on, then you can reboot back into recovery and restore your backup. If voodoo was enabled on your backup make sure voodoo is enabled again before restoring(it might work either way, but I'm not sure). When I've done this, I restore a prerooted 2.2 stock Rom without changing the bootloaders, but almost any official stock rom will also work. I'm on the go, so I don't have a link handy, but post back if needed and I will point you to the odin package I use. Good luck.
Click to expand...
Click to collapse
Thanks...that's exactly what I did, except the backup would never quite "take." It completely loaded and cycled through the boot process, but I ended up on a boot-restore loop. So now I've Odin-ed back to stock with the closest build I could find to my stock (which I don't think is out there yet - FROYO.UVJL6.ULTIMOBILE - do you know anywhere to find it?), rooted, and am searching for a good, stable, battery-friendly mod once again.
s15274n said:
try moving all files to your PC, format your sdcard, reboot, move files back, flash cwr in ROM mgr, backup work? Move critical files back from PC.
Click to expand...
Click to collapse
i did try formatting, then moving all the stuff back and am still getting that same error message
^ what rom are you on, if one?
You could always ODIN, and use my option b cwr in the noob guide. I just tested making a backup using trigger 8/22 and know there are no issues. Not really sure whats up on your end. I will say though, I've emailed koush several times that there is an issue with cwr on the vibrant from rom manager, for some it won't even flash.
phone_noobie said:
i did try formatting, then moving all the stuff back and am still getting that same error message
Click to expand...
Click to collapse
try different sd card..or reinstall CWM...

[Q] Rooted my phone, and got 2 problems

Background
Used many hours to set up phone to my liking. Got a problem with earphone-jack, so i handed it in. I couldnt do a proper backup beforehand, cause this required root access. The earphone-jack got replaced, but they also decided to upgrade my phone to the newest firmware? , deleting everything in the process. I will set everything up again in the weekend, but i do NOT want to do this a third time .
I have searched around for guides, but since i cant find a LQ6 kernel, every guide is telling me to use a different kernel. The best thing would be to root only. Does this work with my phone ?
What i need
Root only
Ability to unroot would also be nice
About phone
Model: GT-I9100
Android v. 4.0.4
Baseband: I9100XXLQ6
Kernel: 3.0.15-1068762 [email protected] #3 SMP PREEMPT Wed Aug 29 13:40:41 KST 2012
Build: IMM76D.XWLPX
Other Question
If i get another problem with the phone, backup everything, unroot and hand it in. If they decide to upgrade my firmware again, will i still be able to restore my backup ? What backup program is best to use in your opinion ? I want app settings, launcher settings and homescreen setup to be backed up.
HELP : GOT TWO NEW QUESTIONS
I tried to follow the guide in "theunderling"s signature.
At first i thought the files were supposed to be on the internal SD card, so i put them there and rebooted the phone into recovery. While there i tried to find my files, of course to no luck. I thought that maybe i had to unplug the USB, so i did this while in rec. menu. Still didnt find the files, so i rebooted my phone. Suddenly there were a REALLY LOUD ALARM NOISE coming from my phone. I have never heard that sound from my phone before. It stopped after a while, but has also happened at random times since. WHAT IS THIS ? (To be clear: this came before i ran any of the downloaded programs/scripts/etc).
After this i found an external SD - card and put the files on this. Got root access in a couple of seconds, and everything seemed fine. But now my computer refuses to connect to the phone "couldnt find hardware-ID" or something (Translated from my windows language, so might not be 100 % accurate. HOW TO FIX ?
BTW Thank you all so much for your time. I really appreciate it
1.use the guide in my sig or flash a siyah rooted kernel.
2.a nand backup.
3.you can just flash the firmware you listed back on your phone and that would unroot it.
Download it from sammobile now and keep it on your pc if you need it later(and keep nand backup there also).
4.if you get it back,reroot again and put the nand backup back on your sd card and flash that in cwm.
Dont forget to back up efs folder once you root(keep that on pc).
1. Do as theunderling said, or you can use the PhilZ-CWM6 kernel, which is pure stock based. http://forum.xda-developers.com/showthread.php?t=1877270
2. Do a NANDROID backup. Make sure to have atleast 1.1GB available on your MicroSD card. This is done in CWM recovery.
3. To unroot, I believe flashing a stock kernel will do the job, if you only have flashed a kernel. Also, the SuperSU app included in the PhilZ kernel has an unroot option.
Also, backup you EFS folder. And have atleast two backups of it.
Ignore my no.3 as I was thinking you would be installing a rom later.
That rooting method I said also lets you unroot.
Hi. Thanks so much for your answers. When rooting my phone, two problems arose (See original post). Would be really grateful for any input on those.
Never heard of an alarm sound happening-maybe you set alarm/event.
Anyway,what stage are you at.Are you definitely rooted.Is the phone booting as normal and can you access recovery/download mode.
theunderling said:
Never heard of an alarm sound happening-maybe you set alarm/event.
Anyway,what stage are you at.Are you definitely rooted.Is the phone booting as normal and can you access recovery/download mode.
Click to expand...
Click to collapse
Hi! Did check around for any events/alarms, and im sure its not the issue. Since i couldnt connect to my phone via USB, i tried Kies Air, and the alarm sound started again. Tried a few times, and EVERY time i start Kies air, i will get this sound for 5-10 seconds. It also happened twice when i werent even touching the phone :/
I have tried two programs which require SU - access. Got a prompt when starting them , and they worked fine . Kies Air works fine too btw. (Its the USB - connection that i cant get to work).
Also: For some reason i had SUPERUSER installed from before, and now i cant uninstall it again. Also, when i gave the two programs i tested superuser access, it showed the SUPERUSER icon. (program in big letters)
Just to make it clear again: The alarm sound came after i had fooled around in recovery mode, before ANYTHING where installed.
Youve not answered the previous questions.
You should be flashing a "safe" siyah kernel and backing up your efs folder.You can make a nand backup before that or after.
Just get the .zip file from gohkmoran site and flash via cwm.Then get hktool from play store for your efs.
Then the alarm/usb/pc problems can be looked into.
theunderling said:
Youve not answered the previous questions.
You should be flashing a "safe" siyah kernel and backing up your efs folder.You can make a nand backup before that or after.
Just get the .zip file from gohkmoran site and flash via cwm.Then get hktool from play store for your efs.
Then the alarm/usb/pc problems can be looked into.
Click to expand...
Click to collapse
Sorry, here are some more info:
Download modeI get a warning screen against installing custom os? volume up for install and volume down for reboot. Have never tried DL boot before, so cant say anything about this one
Recovery mode Boots normal and looks exactly like earlier.
Normal Boot Looks like before i rooted. No new programs either.
Could you link directly to which kernel i should use ? I have no idea :/ sry
Sorry,I should have explained a bit more.
Get the siyah kernel file and put it on your sdcard/internalsd
Do the rachmat stuff again.Once you install cwm.zip and su-busybox.zip..........dont reboot.
Install the siyah-s2-v4.01cwm.zip file (whilst your still in temp cwm)you download from his site(google should take you to the file).
Then you end up with a safe kernel and permanent cwm.
Then you can do nand and efs backups
theunderling said:
Sorry,I should have explained a bit more.
Get the siyah kernel file and put it on your sdcard/internalsd
Do the rachmat stuff again.Once you install cwm.zip and su-busybox.zip..........dont reboot.
Install the siyah-s2-v4.01cwm.zip file (whilst your still in temp cwm)you download from his site(google should take you to the file).
Then you end up with a safe kernel and permanent cwm.
Then you can do nand and efs backups
Click to expand...
Click to collapse
What i did
Resetted to factory settings
Installed cwm.zip
Installed su-busybox.zip
Installed Siyah-s2-v4.1.5-CWM.zip
What i got
No more funky alarms. Neither with kies, or any other program. :good:
Pc connection works if i put it in mass storage mode :good:
Got a CWM app, which i used to take a nandroid backup :good:
Still cant find hardware ID. (So i still cant just connect and open folder)
Thanks so much
Most important is the connection thingy (in case its something "serious" But if you feel in an extremely helpful mood, i got two more questions.
For unrooting To unroot i probably need to:
Flash Stock Kernel (from where ???)
install SU-Uninstaller-Signed.zip
What about CWM and SuperUser. How do i get rid of those 2 ?
Backup
For more advanced backup (backup individual apps etc), I `ve heard about a couple different apps: Titanium Pro and Superuser Elite. Do you recommend one of these?
Try this for your hardware problem.I never use kies as its ****
You can use this,or go to sammobile and flash xwlpx to get back to stock.
You can use titanium backup to backup your apps and also "remove" crappy system apps etc(theres a thread that guides you what to/what is safe to remove).
And get your efs backed up.
theunderling said:
You can use this,or go to sammobile and flash xwlpx to get back to stock.
You can use titanium backup to backup your apps and also "remove" crappy system apps etc(theres a thread that guides you what to/what is safe to remove).
And get your efs backed up.
Click to expand...
Click to collapse
Thanks again!!
I dont like Kies either, but wanted to fix my problem of 2 reasons
- I was afraid it was a symptom of something serious
- MDP mode without kies is nice to use when you only need to upload a few files to your phone on the go
WELL, KIES WAS THE SOURCE OF MY PROBLEMS. When i uninstalled Kies - drivers, it worked perfectly.
Have taken backup of my efs now (with HC-Ktool, which i assume u meant ), so now i will start setting up my phone to my liking. Thanks so much :highfive:
So basically got everything i came for
But, hmm still unsure if i will get completely unrooted phone from flashing stock kernel and removing SU. Wont the CWM that came with Siyah still be installed ? Can i uninstall this normally afterwards ? Or can i uninstall it before i remove superuser, and then use the CWM -booter thingy to get rid of SU ?? Hmm sorry for being such a noob.
slimchancex said:
Thanks again!!
I dont like Kies either, but wanted to fix my problem of 2 reasons
- I was afraid it was a symptom of something serious
- MDP mode without kies is nice to use when you only need to upload a few files to your phone on the go
WELL, KIES WAS THE SOURCE OF MY PROBLEMS. When i uninstalled Kies - drivers, it worked perfectly.
Have taken backup of my efs now (with HC-Ktool, which i assume u meant ), so now i will start setting up my phone to my liking. Thanks so much :highfive:
So basically got everything i came for
But, hmm still unsure if i will get completely unrooted phone from flashing stock kernel and removing SU. Wont the CWM that came with Siyah still be installed ? Can i uninstall this normally afterwards ? Or can i uninstall it before i remove superuser, and then use the CWM -booter thingy to get rid of SU ?? Hmm sorry for being such a noob.
Click to expand...
Click to collapse
I am sure that flashing a stock kernel will unroot your phone, kill me if I am worng . (I am noob also.)
CWM will be removed once your on the stock kernel.
Once you set up your phone,make a nand backup of that.
You want to able to use usb so you can use Odin,especially if something goes wrong flashing something and you cant boot phone, or into cwm.
Flashing a stock rom unroots the phone.For warranty,you go into download mode and check binary is at zero,and official firmware is at yes.

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