[Q] how to flash stock rom via cwm - LG Nitro HD

I have found a couple of optimized stock ROM images on xda and on BBS Gran too, but when I flash it using the cwm method I am always stuck on lg optimus lte logo.
Every cm ROM that I flashed using cwm works fine. I am experiencing this problem with only stock ROMs. Any help ?

Have you ever unbricked the phone? For some reason the stock roms all require you to have ran through the unbrick process at some point unless that has changed recently.

SeriousGeorge said:
Have you ever unbricked the phone? For some reason the stock roms all require you to have ran through the unbrick process at some point unless that has changed recently.
Click to expand...
Click to collapse
I have CWM and can flash custom Roms , i dont think i need to unbrick any further... or maybe I am mistaken ?

it depends when you bought your phone and what updates you have, if you have an old gingerbread p930 that hasn't been updated you might not have to unbrick, i think ics and later and even some gingerbread phones have reported secure bootloader that won't let you boot into cwm, if you can boot into cwm you are fine, if you get a fast boot and a few other warnings when you try to boot into cwm then you have to unbrick. i think it might be harder to unbrick a phone that is getting the errors already but im not sure, it might be the same, i got the error on mine and i was able to unbrick.

salimbaba said:
I have found a couple of optimized stock ROM images on xda and on BBS Gran too, but when I flash it using the cwm method I am always stuck on lg optimus lte logo.
Every cm ROM that I flashed using cwm works fine. I am experiencing this problem with only stock ROMs. Any help ?
Click to expand...
Click to collapse
I'm kind of in the same boat. Well maybe not the same boat, but I'm in one next to you. I've got CM10.1 and I absolutely hate the battery life. I'd like to go back to stock. I'm not sure though if I have to go through the unbricking process or just use CWM to flash the stock rom onto it.

chubbycheese said:
I'm kind of in the same boat. Well maybe not the same boat, but I'm in one next to you. I've got CM10.1 and I absolutely hate the battery life. I'd like to go back to stock. I'm not sure though if I have to go through the unbricking process or just use CWM to flash the stock rom onto it.
Click to expand...
Click to collapse
if you like battery life, use the rom in my sig, i get 9-40 hours on a battery depending on how much the screen is on.
the rom is based of stock at&t ICS with bloatware removed, a few extras added and a lightningfast wind 3.1 kernel preinstalled

chubbycheese said:
I'm kind of in the same boat. Well maybe not the same boat, but I'm in one next to you. I've got CM10.1 and I absolutely hate the battery life. I'd like to go back to stock. I'm not sure though if I have to go through the unbricking process or just use CWM to flash the stock rom onto it.
Click to expand...
Click to collapse
I installed the wind kernel from http://forum.xda-developers.com/showthread.php?t=2119976 and set the governor to smartassv2 based on someones suggestion here and it made a big difference for me. The battery life in CM10.1 went from absolutely dreadful to at least acceptable. Not as good as CM9, but I can live with it for now.
---------- Post added at 01:52 PM ---------- Previous post was at 01:27 PM ----------
salimbaba said:
I have CWM and can flash custom Roms , i dont think i need to unbrick any further... or maybe I am mistaken ?
Click to expand...
Click to collapse
It's possible that it isn't necessary now, but I know that it used to be impossible to flash the stock ics based roms until you had gone through the unbrick process one time. The first time I remember seeing it was in this thread for ho!no!'s rom based on the leaked ics. I know for a fact that even though I had CWM installed and was using CM9 I was not able to install ho!no!'s stock rom until I went through the unbrick process.

KronicSkillz and SeriousGeorge I'll definitely be looking into this. Thanks

Related

Any way to Flash a CMW Firmware via Odin?

I want to try a ICS build rooted, but i cant install a CWM because my phone freeze (i try a lot of things, i have 2 thread a bout that but never found a solution) the only Version that work for me is de ICS,so, i want to install one rooted ICS via odin.Is that possible?
EDIT: sorry, i made a mistake with the title, i want a rooted rom ocustom rom (ICS) via odin
CWM ROMs will not install via Odin. Make sure the ROM is made for the Captivate Glide. If it isn't, it won't work. Make sure the ROM comes with a kernel built for ICS. When flashing the ROM, are there any errors shown in CWM?
Sent from my CM10 Glide
Devian50 said:
CWM ROMs will not install via Odin. Make sure the ROM is made for the Captivate Glide. If it isn't, it won't work. Make sure the ROM comes with a kernel built for ICS. When flashing the ROM, are there any errors shown in CWM?
Sent from my CM10 Glide
Click to expand...
Click to collapse
thanks for your answer, i already fix the problem with the help in other thread (thanks to Rawr0w0) the GB roms still freeze, but the ics works great and rooted
lorddavid said:
thanks for your answer, i already fix the problem with the help in other thread (thanks to Rawr0w0) the GB roms still freeze, but the ics works great and rooted
Click to expand...
Click to collapse
How did you rooted the ics??? my phone freeze everytime i try to flash the cwm.
yako140891 said:
How did you rooted the ics??? my phone freeze everytime i try to flash the cwm.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1953672
try it, there is the solution in that thread. Do exactly what say in the thread and everything will work.
Just a question, your captivate glide is the canadian version? (Rogers)
lorddavid said:
http://forum.xda-developers.com/showthread.php?t=1953672
try it, there is the solution in that thread. Do exactly what say in the thread and everything will work.
Just a question, your captivate glide is the canadian version? (Rogers)
Click to expand...
Click to collapse
it was from rogers now its unlocked i exactly did what say in that thread but when i flash the boot and the stock rooted rom my phone starts to freeze
yako140891 said:
it was from rogers now its unlocked i exactly did what say in that thread but when i flash the boot and the stock rooted rom my phone starts to freeze
Click to expand...
Click to collapse
I see that the Glides with problems are the rogers version, maybe something in software is not the samewith ATT.
first flash the GB kernel (use the overclocked, that was the one that i use), dont select any in odin (f reset for example), restart the phone manually and get back in odin onmediatly and flash the rooted rom. after that, the phone will boot in GB,now flashwit superoneclick ICS and follow the rest of the thread.
I dont know, but its works fine when i dont select any in odin (f reset, etc)
lorddavid said:
I see that the Glides with problems are the rogers version, maybe something in software is not the samewith ATT.
first flash the GB kernel (use the overclocked, that was the one that i use), dont select any in odin (f reset for example), restart the phone manually and get back in odin onmediatly and flash the rooted rom. after that, the phone will boot in GB,now flashwit superoneclick ICS and follow the rest of the thread.
I dont know, but its works fine when i dont select any in odin (f reset, etc)
Click to expand...
Click to collapse
well my phone don't boot on GB it freezez everytime i flash the rooted rom, even when i flash the kernel with odin (uncheked all) then manually reboot and immediately enter on download mode and flash the rooted rom my phone jus freeze
yako140891 said:
well my phone don't boot on GB it freezez everytime i flash the rooted rom, even when i flash the kernel with odin (uncheked all) then manually reboot and immediately enter on download mode and flash the rooted rom my phone jus freeze
Click to expand...
Click to collapse
wich kernel are you using? i use the overclocked, try starting from ICS with superoneclick, then do the process again, i dont know, that worksfor me, start again from ICS,and use the kernel overclocked.
lorddavid said:
wich kernel are you using? i use the overclocked, try starting from ICS with superoneclick, then do the process again, i dont know, that worksfor me, start again from ICS,and use the kernel overclocked.
Click to expand...
Click to collapse
finally i could run cwm on ics but then it freezed on cwm and cant access cwm again did you had that problem???im going to do everything again
yako140891 said:
finally i could run cwm on ics but then it freezed on cwm and cant access cwm again did you had that problem???im going to do everything again
Click to expand...
Click to collapse
Yes, i has that problem, but no more, (dont know if freeze only with usb plug or not) i already has all those problem, but fixe it doing all that say the thread
PD: Again, sorry if i have bad english
lorddavid said:
Yes, i has that problem, but no more, (dont know if freeze only with usb plug or not) i already has all those problem, but fixe it doing all that say the thread
PD: Again, sorry if i have bad english
Click to expand...
Click to collapse
A much simpler way to root your phone is to just Odin clockworkmod recovery then wipe all and format all and flash a rooted ROM.. Takes 5 min
Sent from my Inspire 4G using xda premium
dman3285 said:
A much simpler way to root your phone is to just Odin clockworkmod recovery then wipe all and format all and flash a rooted ROM.. Takes 5 min
Sent from my Inspire 4G using xda premium
Click to expand...
Click to collapse
Yes, i try that, but when i just simply flash clockworkmod via odin, then the phone freeze when i enter in the recovery, to make the recovery work, i do all that say in that thread and works perfect, dont know why.
yako140891 is having the same problem that i has before, and i now that is software problem because is fixed in my phone, but dont know exactly why the phone freeze.
PD: all the phones that have this problem, are from Rogers, maybe is something different but dont know

[Q] One V cdma boot problem. please help

Hey guys my buddy asked me to root rom and install a kernel on his one v from virgin mobile. being as i have done this before to multiple phones i was happy to help. i unlocked the bootloader, rooted it. everything was smooth up til there. i did not put a rom on it yet because he urged me to install a kernel so he could overclock his one v. i was aprehensive but i did it anyway. now his phone wont work. im not surprised but i need to fix it. ive tried installing roms to make it work because the backup ive created in twrp wont boot. so im thinking its a kernel problem. no matter what rom i use it will either not boot it will freeze at the screen that says htc and with the red wording below it. or it will boot into the rom and then freeze or run for about 30 sec then restart and it will repeat this until it dies. ive looked everywhere for ways to get it back to stock ive flashe countless roms none work ive flashed many kernels and none work as well. please help. i would like to get it working on a rom with a working kernel but i will put it back to stock if i have to. any help is greatly appreciated. thank you for your time.
You could flash a ruu ....but the problem is you don't have your software number ...or you have to go to another Rom ...which will make the phone boot normally .but don't forget to flash its specific kernel ...if you don't so that the Rom won't boot
What he said. I recommend using the RUU to restore back to stock.
Re-reroot/unlock it, then read more on which kernel to use. You most likely are using the wrong kernel.
What rom are you using currently - ?
What Kernel did you flash - ?
What error do you get with TWRP - ?
ive only been able to get a couple roms to actually boot. the one that is on it now is Amazing Sense. there is no kernel to flash with this rom and no boot.img for it either. i believe it is included. i have decided to RUU and try everything from the beginning. however i cannot find the RUU for HTC One V in the USA on Virgin Mobile. if you could post a link to that i would be very grateful. i dont see any errors on TWRP and i believe it is the stock rom i flashed last. but like i said with the rom im on it is included, so whatever is on there. thanks again for your help guys.
just curios would the sprint ruu work on the virgin mobile one? it may sound dumb but i have seen people use the recovery.img from it. was just wondering if it would brick the device or not. because i still havent found an RUU for virgin mobile one v in the US.
Nazz45 said:
ive only been able to get a couple roms to actually boot. the one that is on it now is Amazing Sense. there is no kernel to flash with this rom and no boot.img for it either. i believe it is included. i have decided to RUU and try everything from the beginning. however i cannot find the RUU for HTC One V in the USA on Virgin Mobile. if you could post a link to that i would be very grateful. i dont see any errors on TWRP and i believe it is the stock rom i flashed last. but like i said with the rom im on it is included, so whatever is on there. thanks again for your help guys.
Click to expand...
Click to collapse
Nazz45 said:
just curios would the sprint ruu work on the virgin mobile one? it may sound dumb but i have seen people use the recovery.img from it. was just wondering if it would brick the device or not. because i still havent found an RUU for virgin mobile one v in the US.
Click to expand...
Click to collapse
Ok. That's good. You use the same ICS kernel with the same ICS roms. No need to keep reflashing. I wouldn't flash a JB rom using a ICS kernel though.
Use this zip - http://androidfiles.org/uploads/index.php?dir=PrimoC/Kernels/ics
1. Extract the Boot.img from that zip and Fastboot flash boot boot.img in Bootloader
2. Wipe everything. Factory Reset, Dalvik, and System.
3. Flash an ICS based rom, Sense, or CM9.
4. Flash this after rom to get wifi working the zip above or below to fix Wifi.
http://androidfiles.org/uploads/index.php?dir=PrimoC/Kernels/ics
Just ran the RUU and it did work everything is back to stock. the sprint RUU worked. i ran into a snag installing the Android SDK it wouldnt recognize that i had my Java JDK. even after messing with my registry it still wouldnt work so i just downloaded the x86 jdk and it worked. its unfortunate cuz now i have a jdk in x64 and x86 and its taking up space on my ssd. oh well i hope it doesnt mess with eclipse. i am now going to unlock the bootloader again and re root it and install probably cm9. thank you for all your help i will post again after i attempt to re unlock reroot and rom. thanks again

Stock kernel/Odin issue

Alright, so I'm trying to reflash the stock kernel for my stock, rooted, Sprint 4.2.1 Galaxy Nexus(the GA02 kernel). I managed to get the .tar file from Samsung's site but ODIN keeps on closing on my PC when it gets to 'file analysis'. I have my phone connected, and everything is recognized and ready to go, but the program keeps freezing at that point. So, does anyone have a link for a flashable zip for the kernel? Or can anyone tell me what I'm doing wrong with ODIN? Thanks in advance.
Here you are: http://forum.xda-developers.com/showthread.php?t=1992483&highlight=stock+kernel
noname580 said:
Here you are: http://forum.xda-developers.com/showthread.php?t=1992483&highlight=stock+kernel
Click to expand...
Click to collapse
I tried this kernel and it drains my battery so badly it won't charge.
Ramocity said:
I tried this kernel and it drains my battery so badly it won't charge.
Click to expand...
Click to collapse
I just so happened to be looking for a stock kernel as I was going to start playing around with them. I haven't yet tested it. Thanks for the heads up. The only thing left to do is wipe and backup for stock kernel.
Why don't you extract boot.img from the corresponding factory image (available here https://developers.google.com/android/nexus/images#mysidspr; variant 'toroplus'), and flash that through fastboot? I don't understand why some make no effort to use the tools GOOGLE gave us. For most purposes, you're the proud owner of a Nexus device.
a maguro wrote this.

[Q] Remove Cyanogenmod Problem

Hi,
I had stock 4.3 firmware on my att i747 galaxy s3, then I decided to flash cyanogenmod. everything went well but i dont really like it.
Now I want to go back to stock. I tried flashing the stock rom with odin but it fails and it says this on the phone:
ODIN MODE
PRODUCT NAME: SGH-I747
CUSTOM BINARY DOWNLOAD: Yes (2 counts)
CURRENT BINARY: Custom
SYSTEM STATUS: Official
QUALCOMM SECUREBOOT: ENABLE
Warranty Bit: 1
BOOTLOADER RP SWREV: 2
SW REV CHECK FAIL : Fused 2 > Binary 0
The android version it shows is 4.3.1 and im able to use it normally with the cyanogenmod.
What can I do to flash a stock rom back?
EDIT: used triangle away and the custom binary download says "no" now and the current binary says "samsung official" but still get the same problem.
Thank You
bryangd07 said:
Hi,
I had stock 4.3 firmware on my att i747 galaxy s3, then I decided to flash cyanogenmod. everything went well but i dont really like it.
Now I want to go back to stock. I tried flashing the stock rom with odin but it fails and it says this on the phone:
Thank You
Click to expand...
Click to collapse
You need to flash a stock ROM that has no boot loader attached to it. I just reverted my S3 back to stock from CM11 so that I could sell it. Flash a Rom.zip through recovery and it should work fine. I see you are ATT so I suggest this one: http://forum.xda-developers.com/showthread.php?t=2540998. You have the choice of Stock Rooted without bootloader which is what you will be looking for. This thread also has everything you may need. Do not attempt to use Odin to flash roms with older bootloaders or you will find major issues.
You will almost definitely need to wipe everything so back everything up and be sure to take a Nandroid.
BCSC said:
You need to flash a stock ROM that has no boot loader attached to it. I just reverted my S3 back to stock from CM11 so that I could sell it. Flash a Rom.zip through recovery and it should work fine. I see you are ATT so I suggest this one: http://forum.xda-developers.com/showthread.php?t=2540998. You have the choice of Stock Rooted without bootloader which is what you will be looking for. This thread also has everything you may need. Do not attempt to use Odin to flash roms with older bootloaders or you will find major issues.
You will almost definitely need to wipe everything so back everything up and be sure to take a Nandroid.
Click to expand...
Click to collapse
thanks for answering, sorry i dont know much about this, can you tell me which one has no bootloader on it?
bryangd07 said:
thanks for answering, sorry i dont know much about this, can you tell me which one has no bootloader on it?
Click to expand...
Click to collapse
In that thread you have 2 good options that I can see. Scroll down and you will find one ROM by upndwn4par/full and another debloated directly under it. Which you chose depends on if you want Samsung/ Google software on it. The upndwn4par file will have you closer to stock than the other. Please be sure to read a couple pages, even if you don't get any immediate knowledge from it you will become way more familiar with these processes. It's worth the time, and safer for your phone.
BCSC said:
In that thread you have 2 good options that I can see. Scroll down and you will find one ROM by upndwn4par/full and another debloated directly under it. Which you chose depends on if you want Samsung/ Google software on it. The upndwn4par file will have you closer to stock than the other. Please be sure to read a couple pages, even if you don't get any immediate knowledge from it you will become way more familiar with these processes. It's worth the time, and safer for your phone.
Click to expand...
Click to collapse
Thanks once again, i will download the debloated one. But I have a question, that won't be a stock rom right? If the bootloader is the problem is there a stock d2att 4.3 rom i can flash?
That is a stock ROM. It is just pre rooted with knox removed. It is a modified version of the Stock OTA with the problematic parts removed..
BCSC said:
That is a stock ROM. It is just pre rooted with knox removed. It is a modified version of the Stock OTA with the problematic parts removed..
Click to expand...
Click to collapse
how do i flash this rom? using the phone recovery(VU+home+power) ?
EDIT: i tried that and it failed the verification
What recovery are you using? Latest CWM?
BCSC said:
What recovery are you using? Latest CWM?
Click to expand...
Click to collapse
i don't know, the original i guess
bryangd07 said:
i don't know, the original i guess
Click to expand...
Click to collapse
You need a custom recovery to flash this. CWM or TWRP. I'm not too sure how you got to CM without one but be sure you have one and then flash the Rom from above. You can install CWM with the app 'Rom Manager'.
See here http://forum.xda-developers.com/showthread.php?t=2538991
BCSC said:
You need a custom recovery to flash this. CWM or TWRP. I'm not too sure how you got to CM without one but be sure you have one and then flash the Rom from above. You can install CWM with the app 'Rom Manager'.
See here http://forum.xda-developers.com/showthread.php?t=2538991
Click to expand...
Click to collapse
I installed CWM but now that i used cyanogen for a while im starting to like it. The only thing that I dont like is the music player. I downloaded google play but it is even worst, my playlists are not even in order. Is there any way of flashing the stock samsung music player on cyanogenmod or is it integrated with the touchwiz?
Thanks for all the help you gave me so far.
EDIT: I found this thread about ported s4 apps: http://forum.xda-developers.com/showthread.php?t=2267029, can i just flash it with CWM using cyanogenmod?
You can not flash that S4 port. It says it is specifically for the Galaxy advance. Also you are correct that the Samsung player requires Touchwiz. Try Power Amp, it has pretty good reviews and features. A 3rd party player is probably your best bet. You can cherry pick for features
BCSC said:
You can not flash that S4 port. It says it is specifically for the Galaxy advance. Also you are correct that the Samsung player requires Touchwiz. Try Power Amp, it has pretty good reviews and features. A 3rd party player is probably your best bet. You can cherry pick for features
Click to expand...
Click to collapse
I tried a lot of players and didn't like any. Flashed the ROM you indicated using CWM and it worked. Did it all for the player Everything is working fine now and I really like how it doesn't have all the bloatware from att.
Thank you very much for the help.
bryangd07 said:
I tried a lot of players and didn't like any. Flashed the ROM you indicated using CWM and it worked. Did it all for the player Everything is working fine now and I really like how it doesn't have all the bloatware from att.
Thank you very much for the help.
Click to expand...
Click to collapse
No problem dude. I always found myself going back to Touchwiz as well. Let me know if you need more help.

need help choosing the right rom

I just recieved a sprint s3 sph-l710 with 4.4.2 from a friend. I rooted and installed trwp recovery but after looking through the roms I cant figure out which one would work. also I read some of the roms have a problem with LTE?
teknoweanie said:
I just recieved a sprint s3 sph-l710 with 4.4.2 from a friend. I rooted and installed trwp recovery but after looking through the roms I cant figure out which one would work. also I read some of the roms have a problem with LTE?
Click to expand...
Click to collapse
Check this thread: http://forum.xda-developers.com/galaxy-s3-sprint/development
Basically, the most stable ones are non-AOSP/CM roms. The others run pretty well, but may have a little issue here or there. The WickedX series is probably the most active TouchWiz rom (close to stock) that will have the fewest bugs.
Hmm when I installed thebarebones wicked x rom the phone seemed to heat up excessively. Most likely from the theme. It was sitting around 114 degrees Fahrenheit. on the stock one it goes from 80 sitting at about 95 to 104 degrees Fahrenheit when im using the stock Android browser.
teknoweanie said:
Hmm when I installed thebarebones wicked x rom the phone seemed to heat up excessively. Most likely from the theme. It was sitting around 114 degrees Fahrenheit. on the stock one it goes from 80 sitting at about 95 to 104 degrees Fahrenheit when im using the stock Android browser.
Click to expand...
Click to collapse
I prefer AICP 9.0 ( http://dwnld.aicp-rom.com/?device=d2spr ) but that's because I hate Touchwiz (stock) and I want lollipop. The latest nightlies are actually really stable, but if you want a for sure stable release I'd go with a kitkat d2lte ROM or touchwiz.
Is there a description of what's removed and changed for aicp? Or some interesting features? Looking for really barebones with most stuff removed. I got this stock one im using down to 1gb free ram so far. Seems to keep it cooler not doing so many processes all at once. Also i can down clock the cpu to below 1ghz without all the background stuff using up the excess processing power. Doesn't feel so much like a pocket warmer even while quickly going through pages.
Edit: have you had any problems with 9.0? It seems like data doesn't work for me on version 8 is there some fix to flash for 8 or should I just try 9?
If you're on the actual sprint (not virgin mobile, boost, etc) then your data should work fine on 9.0. AICP is not barebones, however. I'd think of it as cm with some good added features. However, I have like 1gb of free ram on aicp idle.
---------- Post added at 02:07 AM ---------- Previous post was at 02:06 AM ----------
9.0 works great for me on my virgin mobile s3. The latest nightlies are very stable.
Im on sprint.. Do i need to update firmware or flash a radio for it to work? Im using 4.4.2 stock. Also just to make sure im not doing it wrong. What are steps for flashing this specific rom?
teknoweanie said:
Im on sprint.. Do i need to update firmware or flash a radio for it to work? Im using 4.4.2 stock. Also just to make sure im not doing it wrong. What are steps for flashing this specific rom?
Click to expand...
Click to collapse
You are on ND8 if you are running that rom. Some people have reported success and some have not using that firmware. NJ2 seems to be better for running lollipop roms.
MAKE UP A NANDROID BAKCUP OF YOUR CURRENT SET UP
To update to NJ2: http://www.sammobile.com/firmwares/download/41671/L710VPUDNJ2_L710SPRDNJ2_SPR/
Flash a recovery via ODIN, it is the program you used in the above step: http://forum.xda-developers.com/showthread.php?t=2201860
There is also TWRP somewhere, but even though Philz isn't being developed, I haven' t had any issues with it. But if you want to recover your previous setup, it is probably best to use the same recovery as before.
Restore your old setup.
Most roms come with instructions for installation in the post. Basically, nAndroid backup, wipe data/system, install zip of rom, and then GApps if needed. Most custom roms are already rooted about of the box.
Do you have a link to the firmware that doesnt require me to register?
teknoweanie said:
Do you have a link to the firmware that doesnt require me to register?
Click to expand...
Click to collapse
http://forum.xda-developers.com/gal.../stock-l710vpudnj2-pc-odin-flashable-t3007847
thank you! ill try to update it later. also if I update the firmware will i still be able to flash the back to a older rom? i know there probably isnt and you most likely would of posted it first but is there a firmware i can just flash from trwp recovery?
EDIT: also i am teknoweanie i just can never remember my password when i change computers/phones. lol ^^
Kannz2 said:
thank you! ill try to update it later. also if I update the firmware will i still be able to flash the back to a older rom? i know there probably isnt and you most likely would of posted it first but is there a firmware i can just flash from trwp recovery?
EDIT: also i am teknoweanie i just can never remember my password when i change computers/phones. lol ^^
Click to expand...
Click to collapse
No. You need to use odin for the firmware upgrade. Just make a backup of your rom before flashing. If you are using twrp now, just flash that tar through odin when you finish. Then, you can reboot to recovery and restore that backup after flashing the new firmware. And everything will be the same. The whole process will probably take you 30.minutes.

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