[Q] Modem downgrade with XXEMG5 - Galaxy S III Q&A, Help & Troubleshooting

Hello to all,
i have problem of heating and i want to flash a specific modem that seems to be perfect combo with my operator in my country but i have flashed latest omega.
Now i have DDEMG2 modem and XXEMG5 build.
I have read about EFS problems so, before flashing these new types of firmware i have hade a backup of my EFS with EFS_Professional_2.0.62 so i know that i can downgrade modem having my actual rom but.... HOW?
I don't want have any type of poblem so i'm asking for a simple "how to" to make all procedure correctly.
I need to downgrade since i have problem of heating under 3g connection and seems that with specific modem my situation in this sense will be better.
Can anyone help me?

Turn off 3g from build prop.
For downgrading u cn reflash ur current rom
Or its lower or base version.
Post d results.
Hit thanks if I helped u..
A click for u but rep for me.
Sent from my LT26i using xda premium

ADDICT.ANK said:
Turn off 3g from build prop.
For downgrading u cn reflash ur current rom
Or its lower or base version.
Post d results.
Hit thanks if I helped u..
A click for u but rep for me.
Sent from my LT26i using xda premium
Click to expand...
Click to collapse
Sorry i haven't understand.
I want only flash a different modem. How can I do it without problems on efs folder?
What about 3g and build.prop?
From universe with my gs3

U would probably hv toggle for2g n 3g
Leave d build prop fr later.
Extract modem file from the rom package i.e. Tar.
And add in the rom u wnt to
Hit thanks if I helped u..
A click for u but rep for me.
Sent from my LT26i using xda premium

Modem flash should not damage EFS .
jje

JJEgan said:
Modem flash should not damage EFS .
jje
Click to expand...
Click to collapse
Probably should not but dont take the risk backup your data and rom
and imp especially imei and simlock backup ur efs....As it can come handy anytime......just to get out from debranding o losing ur imei....
Checkout the thread and backup ur imei efs data first.....
http://forum.xda-developers.com/showthread.php?t=2145464

ADDICT.ANK said:
Probably should not but dont take the risk backup your data and rom
and imp especially imei and simlock backup ur efs....As it can come handy anytime......just to get out from debranding o losing ur imei....
Checkout the thread and backup ur imei efs data first.....
http://forum.xda-developers.com/showthread.php?t=2145464
Click to expand...
Click to collapse
Preaching to the choir there.... JJE knows full well about EFS backups. He and I answer 10 threads a day on this subject.
Thats why I wrote the thread in my signature

rootSU said:
Preaching to the choir there.... JJE knows full well about EFS backups. He and I answer 10 threads a day on this subject.
Thats why I wrote the thread in my signature
Click to expand...
Click to collapse
So in order to flash my preferite modem without problem I have to
-restore backup of efs before the new format
-flash my preferite modem
Right?
From universe with my gs3

Is your efs in new format? Mg4 is but mg5 is older changelog so not sure that it changes format
Sent from my GT-I9300 using Tapatalk 4

rootSU said:
Is your efs in new format? Mg4 is but mg5 is older changelog so not sure that it changes format
Sent from my GT-I9300 using Tapatalk 4
Click to expand...
Click to collapse
Now I'm on mg5 but I have also flashed before mg4.
How we can check the format?
From universe with my gs3

If you went from mg4 to mg5 without restoring efs, it should be same format for both. So yes, flash your modem of choice and restore pre mg4 efs backup
Sent from my GT-I9300 using Tapatalk 4

rootSU said:
If you went from mg4 to mg5 without restoring efs, it should be same format for both. So yes, flash your modem of choice and restore pre mg4 efs backup
Sent from my GT-I9300 using Tapatalk 4
Click to expand...
Click to collapse
So i have to go in recovery then flash modem then flash efs backup before reboot?
If somenthing goes wrong....i can restore original no rooted and stock firmware and start with a "new" phone?

rootSU said:
Preaching to the choir there.... JJE knows full well about EFS backups. He and I answer 10 threads a day on this subject.
Thats why I wrote the thread in my signature
Click to expand...
Click to collapse
NOT PREACHING
just helping gave the thread in order too avoid confusion
And about flashing yes....but u'll not lose ur imp stuff i.e. imei...u'll be in stock but do backup your efs pls
Nice working with you though...
keep posted

So what I have to do guys?
From universe with my gs3

A solution
mattiadj said:
So what I have to do guys?
From universe with my gs3
Click to expand...
Click to collapse
Made a backup of ur imei ??
If then proceed
Flash the modem of our choice and restore or flash ur efs backup before rebooting....
and damn ur done.... :highfive: :victory:
And post the results here pls they worth a lot... :good:

ADDICT.ANK said:
Made a backup of ur imei ??
If then proceed
Flash the modem of our choice and restore or flash ur efs backup before rebooting....
and damn ur done.... :highfive: :victory:
And post the results here pls they worth a lot... :good:
Click to expand...
Click to collapse
I have a backup of the situation before the change of efs folder. I have to restore it after flashing modem?
From universe with my gs3

mattiadj said:
I have a backup of the situation before the change of efs folder. I have to restore it after flashing modem?
From universe with my gs3
Click to expand...
Click to collapse
Great good luck and proceed
And keep posted
:highfive:

Related

Lost IMEI on test firmware I9300XXUFME7_I9300OXAFME7_OXA

Does ne1 know why i keep losing my IMEI everytime i flash the I9300XXUFME7_I9300OXAFME7_OXA rom. i've used this test firmware before and everything was ok and then i went to an official rom. But when i reflashed this rom, I keep getting 004999010640000 / 01 on my IMEI.
Follow link to sticky roll-up in my signature. Read the imei / efs thread
Sent from my GT-I9300 using Tapatalk 4
I have the exact problem, and am stuck with omega 4.1.2 for weeks now !
Sent from my GT-I9300 using xda premium
See above
Sent from my GT-I9300 using Tapatalk 4
okizen said:
Does ne1 know why i keep losing my IMEI everytime i flash the I9300XXUFME7_I9300OXAFME7_OXA rom. i've used this test firmware before and everything was ok and then i went to an official rom. But when i reflashed this rom, I keep getting 004999010640000 / 01 on my IMEI.
Click to expand...
Click to collapse
Asseel said:
I have the exact problem, and am stuck with omega 4.1.2 for weeks now !
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
This is from the Omega thread OP..
1. Make sure to make and keep in a safe place an efs backup - nadroid backup - titanium backup - etc, in case you ever need to restore!
2. With the new firmware from Samsung for the S3 they have changed some security code that will disable the use of older modems, the new update changes the EFS partition which makes it impossible for an older modem being use without upsetting your IMEI (No Phone Signal), please make sure you do have a backup of your EFS in a safe place before you flash to the latest Omega ROM.
This is what Samsung has done, and it seems that its being done to all the new Modems on all the high end devices.
More info
3. Flash with No Full Wipe only from v43.x and previous Omega 4.1.2 versions - if
Click to expand...
Click to collapse

[Q] efs and imei - all roms?

Hi
Just wondered about this efs and imei trouble, does this concern all newer (or older) roms? I've got ultimarom v12 on my international s3 going good, but wonder about changing to the newest ultimarom but then I read about problems with imei.
Is this something new you have to do with all roms now?
Frode
EFS and IMEI problems since day one especially for noobs who have not read the basic faqs and guides and have no EFS backup .
Current released firmware Samsung have changed the EFS Folder .
http://forum.xda-developers.com/showthread.php?t=2377731
jje
I have rooted and installed ultimarom without any problems. was I just lucky then? Do you have to take backup of efs folder every time? It's not good enough with backup of rom when you flash a new rom?
Frode
molland said:
I have rooted and installed ultimarom without any problems. was I just lucky then? Do you have to take backup of efs folder every time? It's not good enough with backup of rom when you flash a new rom?
Frode
Click to expand...
Click to collapse
As written in the guides, you should make a backup of your efs at the very beginning one time and keep it somewhere safe. Without imei and efs backup otherwise you have to go back to Samsung...
Sent from my GT-I9300 using xda app-developers app
ok, but since its working now, can I take a backup now of the efs folder for later use?
Frode
molland said:
ok, but since its working now, can I take a backup now of the efs folder for later use?
Frode
Click to expand...
Click to collapse
Save a backup. When creating other backups though....skip efs
Sent from my Galaxy Nexus using xda app-developers app
molland said:
ok, but since its working now, can I take a backup now of the efs folder for later use?
Frode
Click to expand...
Click to collapse
Yes !!!
sent from the state where marijuana is NOT illegal !
@kangerX Thats an answer I like
Can I use a tool like one of these : http://forum.xda-developers.com/showthread.php?t=1901098 or : efs pro 1.9.12 to take a backup with?
Frode
used Ktool now and took a backup of efs, now I've got to files, one img and one tar file, copy to my pc og cloud storage

[Q] efs backup/restore and safe rom change

Hi all, I know that i have to backup my EFS in order to change ROM's (I already have it backed up), but my question is, will efs folder be corrupt if i change only 4.1.2 ROM's, or is it just due to downgrade from 4.3 to 4.x.x.
I had my phone service twice because my efs was corrupt, and yes, i have restored my valid and good efs, when the signal was working, but it didn't help.
So I am just asking will i break my efs with changing from for ex. stock 4.1.2 to some custom 4.1.2 rom?
Also, I can't backup my efs via EFS professional, it cannot create the final step creating .tar file, I did efs backup with k-tool but when i restored my valid efs it was also no signal problem. Everything went good with backing up to PC.
Yes, I read other threads, but I am just asking for a direct opinion.
Thx in front.
Direct opinion is read the efs 'know this stuff' sticky -tells you everything you need to know.
Sent from my GT-I9300 using Tapatalk
boomboomer said:
Direct opinion is read the efs 'know this stuff' sticky -tells you everything you need to know.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
Ok, so, if I am on XXEMG4 firmware i must stick to MG based basebands/firmwares in order for my efs to work, right?
XXEMG4 or later, any baseband/firmware after this will work with efs v2
Sent from my GT-I9300 using Tapatalk
boomboomer said:
XXEMG4 or later, any baseband/firmware after this will work with efs v2
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
Thank You!

[Q] Please help, I can't find clear answer

Hello
My friend bought GS3 months ago in Arabic country with ICS 4.0.4 installed. When I saw the box, I found that the GS3 is a grey market product. It has Region Lock label written in Russian language on the box and the ROM is pre-rooted CWM Custom ROM
Now, Kies dose not upgrade this version and he wishes to have Arabic stock ROM 4.3 if possible. What are the safest steps to do?
- If I download and flash Arabic stock ROM, will I loose modem connectivity?
- Do I need to backup and restore EFS data if I flash stock ROM?
- Do I need root to restore EFS data/modem driver after flashing STOCK ROM?
- Should I flash custom ROM instead of Stock ROM?
I want a safe way, I don't wish to cause network/EFS loss to the device?
I read a lot but came to no conclusion.. please help
Hello
My friend bought GS3 months ago in Arabic country with ICS 4.0.4 installed. When I saw the box, I found that the GS3 is a grey market product. It has Region Lock label written in Russian language on the box and the ROM is pre-rooted CWM Custom ROM
Now, Kies dose not upgrade this version and he wishes to have Arabic stock ROM 4.3 if possible. What are the safest steps to do?
- If I download and flash Arabic stock ROM, will I loose modem connectivity?
- Do I need to backup and restore EFS data if I flash stock ROM?
- Do I need root to restore EFS data/modem driver after flashing STOCK ROM?
- Should I flash custom ROM instead of Stock ROM?
I want a safe way, I don't wish to cause network/EFS loss to the device?
I read a lot but came to no conclusion.. please help
Click to expand...
Click to collapse
Kies shld have an emergency firmware feature. Try using it.
1. U will not. Just dun downgrade
2. If u aren't gg back to 4.1.2, dun bother. But recommended.
3. Yes.
4. Ur choice. If u wan bugless rom, go for stock rom. Many also say stock is one of the best.
Sent from my GT-I9300 using xda app-developers app
JellyYogurt said:
Kies shld have an emergency firmware feature. Try using it.
1. U will not. Just dun downgrade
2. If u aren't gg back to 4.1.2, dun bother. But recommended.
3. Yes.
4. Ur choice. If u wan bugless rom, go for stock rom. Many also say stock is one of the best.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Thanks for reply. I read that some people lost the IMEI when they flashed STOCK ROM 4.3? as I said the device came from Russian market and I want to flash Middle east ROM?
Which JB version is save to flash and won't loose the IMEI?
xIndex said:
Thanks for reply. I read that some people lost the IMEI when they flashed STOCK ROM 4.3? as I said the device came from Russian market and I want to flash Middle east ROM?
Which JB version is save to flash and won't loose the IMEI?
Click to expand...
Click to collapse
If u are rly just tat scared to lose ur imei. Go kies and do the firmware recovery. U will get stock rom automatically.
Sent from my GT-I9300 using xda app-developers app
Depends on the phone history on what will happen on upgrade to 4.3, sim lock may return or imei lost due to patched efs folder. No way to know until you get flash, so backup efs now.
4.1.2 EMG4 is when efs format changed, anything before this shouldn't cause too many issues.
Sent from my GT-I9300 using Tapatalk
boomboomer said:
Depends on the phone history on what will happen on upgrade to 4.3, sim lock may return or imei lost due to patched efs folder. No way to know until you get flash, so backup efs now.
4.1.2 EMG4 is when efs format changed, anything before this shouldn't cause too many issues.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
That's what I am worried about. To loose IMEI or get the region lock back. The phone model is GT-I9300RWDEUR. Can I find stock rom for it with no region lock?
so confusing !!
JellyYogurt said:
If u are rly just tat scared to lose ur imei. Go kies and do the firmware recovery. U will get stock rom automatically.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
I am worried I will get back the region lock crap if I do firmware recovery!!
The model is GT-I9300RWDEUR European SIM model
The ICS 4.0.0 is causing to many problems and device hangs all the time
Actually it is from Greece. I was confused with the language (Ελβετία= Swiss)
boomboomer said:
Depends on the phone history on what will happen on upgrade to 4.3, sim lock may return or imei lost due to patched efs folder. No way to know until you get flash, so backup efs now.
4.1.2 EMG4 is when efs format changed, anything before this shouldn't cause too many issues.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
So if I upgrade to 4.1.2 before EMG4 , I won't have EFS/IMEI problem?
All I have to do to flash midle east ROM and then to find the Modem driver and install it through odin?
xIndex said:
So if I upgrade to 4.1.2 before EMG4 , I won't have EFS/IMEI problem?
All I have to do to flash midle east ROM and then to find the Modem driver and install it through odin?
Click to expand...
Click to collapse
Modem may be a CWM zip not a tar .
JJEgan said:
Modem may be a CWM zip not a tar .
Click to expand...
Click to collapse
What is the difference? Odin only flashes tar?
I need to find modem driver in tar format first?
Odin flashes tar
CWM and other custom recovery flashes zips .
Suggest you read the basic faqs and guides first .
STICKYS
http://forum.xda-developers.com/showthread.php?t=2344125
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Downgrade and network problems .
http://forum.xda-developers.com/showthread.php?t=2531221
Thanks for the info.
I found UAE ROM that uses the same Greece Modem number. Is it safe to flash it?
http://www.sammobile.com/firmwares/3/?download=25063
http://www.sammobile.com/firmwares/3/?download=23767

noob in desperate need of help (s3 with no network signal)

hi guys
today i've flashed this ROM on a SAMSUNG S GALAXY 3
http://forum.xda-developers.com/galaxy-s3/development/rom-smartdroid-v1-0-t2602543
Revolutionary S5 V3 - Why buy an S5? [PATCHED V3]
The s3 was alread rooted
all the process of flashing went fine,but when i rebooted BANG no network signal.
in the ROM thread ppls reported to flash this particular modem to bring back signal
but it did not work
please help me, this phone is property of my boss
unfortunately I only run a Nandroid backup before flash
which data can serve to help me?
Before the flash the phone was equipped with Android 4.2
pls help me
ps if i run the *#1234# my csc is i93000xafme7
Sefiro said:
hi guys
today i've flashed this ROM on a SAMSUNG S GALAXY 3
http://forum.xda-developers.com/galaxy-s3/development/rom-smartdroid-v1-0-t2602543
Revolutionary S5 V3 - Why buy an S5? [PATCHED V3]
The s3 was alread rooted
all the process of flashing went fine,but when i rebooted BANG no network signal.
in the ROM thread ppls reported to flash this particular modem to bring back signal
but it did not work
please help me, this phone is property of my boss
unfortunately I only run a Nandroid backup before flash
which data can serve to help me?
Before the flash the phone was equipped with Android 4.2
pls help me
ps if i run the *#1234# my csc is i93000xafme7
Click to expand...
Click to collapse
You Flashed DEVIL KERNEL?
If you did http://forum.xda-developers.com/galaxy-s3/orig-development/kernel-devil2-2-3-2-omni-cm-samsung-t2528624 the first flashers LOSE Their baseband too.
Try to read the thread on how they fixed the problem. Are you running on CM? Dual Boot?
thokzz said:
You Flashed DEVIL KERNEL?
If you did http://forum.xda-developers.com/galaxy-s3/orig-development/kernel-devil2-2-3-2-omni-cm-samsung-t2528624 the first flashers LOSE Their baseband too.
Try to read the thread on how they fixed the problem. Are you running on CM? Dual Boot?
Click to expand...
Click to collapse
no i'm stick to standard base kernel
i can provide the last 7 numbers of my imei also
8282823
now i restored the nandroid backback (4.2)
nothing changed
pls guys help me
the owner of the phone is really mad at me now
i'm so sad
ps yes i'm under phil cm touch rooted
no one can help me=
Sefiro said:
no i'm stick to standard base kernel
i can provide the last 7 numbers of my imei also
8282823
now i restored the nandroid backback (4.2)
nothing changed
pls guys help me
the owner of the phone is really mad at me now
i'm so sad
ps yes i'm under phil cm touch rooted
no one can help me=
Click to expand...
Click to collapse
Bump for me
Flash the full stock rom for your country with Odin then factory reset in recovery. If efs is not read by the stock rom then restore your efs backup.
No backup then you'll have to pay for a repair.
Sent from my GT-I9300 using Tapatalk
boomboomer said:
Flash the full stock rom for your country with Odin then factory reset in recovery. If efs is not read by the stock rom then restore your efs backup.
No backup then you'll have to pay for a repair.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
Tnx for your answer
I live in a very small town so for sure i must search on the web a shop able to repair the s3
Can you suggest my what kind of repair need the phone in this situation?
Like if i find a shop now what i must say to the employer?
Just no network signal or there are a common statement for this problem?
Really tnx for your help
Sefiro said:
hi guys
today i've flashed this ROM on a SAMSUNG S GALAXY 3
http://forum.xda-developers.com/galaxy-s3/development/rom-smartdroid-v1-0-t2602543
Revolutionary S5 V3 - Why buy an S5? [PATCHED V3]
The s3 was alread rooted
all the process of flashing went fine,but when i rebooted BANG no network signal.
in the ROM thread ppls reported to flash this particular modem to bring back signal
but it did not work
please help me, this phone is property of my boss
unfortunately I only run a Nandroid backup before flash
which data can serve to help me?
Before the flash the phone was equipped with Android 4.2
pls help me
ps if i run the *#1234# my csc is i93000xafme7
Click to expand...
Click to collapse
If your IMEI is 0049 or null, try to use a patched MG4 modem first. Revolutionary roms don't have modem in them so that can cause some issues occasionally.
Let me know if it works.
~ RazorMC
Sefiro said:
hi guys
today i've flashed this ROM on a SAMSUNG S GALAXY 3
http://forum.xda-developers.com/galaxy-s3/development/rom-smartdroid-v1-0-t2602543
Revolutionary S5 V3 - Why buy an S5? [PATCHED V3]
The s3 was alread rooted
all the process of flashing went fine,but when i rebooted BANG no network signal.
in the ROM thread ppls reported to flash this particular modem to bring back signal
but it did not work
please help me, this phone is property of my boss
unfortunately I only run a Nandroid backup before flash
which data can serve to help me?
Before the flash the phone was equipped with Android 4.2
pls help me
ps if i run the *#1234# my csc is i93000xafme7
Click to expand...
Click to collapse
Hello There,
I think the problem is the rom itself, i advise you to degrade your phone to its stock rom/orig rom and find a better rom.
RazorMC said:
If your IMEI is 0049 or null, try to use a patched MG4 modem first. Revolutionary roms don't have modem in them so that can cause some issues occasionally.
Let me know if it works.
~ RazorMC
Click to expand...
Click to collapse
Well my IMEI seems to be normal,it is not recommended to post it here?
Ps there is a way to find what was the original ROM of the phone?
Ps the imei shown on the phone is the same of the one shown on the back of the phone
Is this a good thing? Means no corrupted imei?
Sefiro said:
Ps the imei shown on the phone is the same of the one shown on the back of the phone
Is this a good thing? Means no corrupted imei?
Click to expand...
Click to collapse
Indeed
Sefiro said:
Well my IMEI seems to be normal,it is not recommended to post it here?
Ps there is a way to find what was the original ROM of the phone?
Ps the imei shown on the phone is the same of the one shown on the back of the phone
Is this a good thing? Means no corrupted imei?
Click to expand...
Click to collapse
- I would recommend never to post imei anywhere
- If the imei matches then all's ok.
- Stock rom depends on the country. You can search on sammobile and flash with Odin. 4.3 not recommended if you like flashing roms.
~ RazorMC
alecore said:
Indeed
Click to expand...
Click to collapse
What i can do to restore network?
I advise to flash patched modems
You should try 2
Before mg version and after mg version
To check work both efs versions
If you don't know about efs stuff I advice to read imei thread in the sticky. Good luck with flashing modems :good:
husokal said:
I advise to flash patched modems
You should try 2
Before mg version and after mg version
To check work both efs versions
If you don't know about efs stuff I advice to read imei thread in the sticky. Good luck with flashing modems :good:
Click to expand...
Click to collapse
Can you post here a link for patched modems pls?
http://forum.xda-developers.com/attachment.php?attachmentid=2384611&d=1384123364
This is mj. For efs v2
Backup your efs
Btw this is i your roms q&a section!
Q1. Why do i not have Mobile Network after flashing this rom?
Ans. Thats because u need a EFS v2 Modem for 4.3 Roms
Sent from my GT-N7100 using XDA Free mobile app
husokal said:
http://forum.xda-developers.com/attachment.php?attachmentid=2384611&d=1384123364
This is mj. For efs v2
Backup your efs
Btw this is i your roms q&a section!
Q1. Why do i not have Mobile Network after flashing this rom?
Ans. Thats because u need a EFS v2 Modem for 4.3 Roms
Sent from my GT-N7100 using XDA Free mobile app
Click to expand...
Click to collapse
so i must choise one of this patched modem if I understand correctly
https://drive.google.com/folderview...sharing&tid=0B6MIUd7HJudAbU5YaGkzOUowMG8#list
no need of flashing the kernel also?
Give it a chance
husokal said:
Give it a chance
Click to expand...
Click to collapse
YES I DID IT!!!!!
flashed Patched_XXUGMK6_kernel.zip and Patched_XXUGMK6_modem.zip
network signal come back
tnx guys really
Sefiro said:
YES I DID IT!!!!!
flashed Patched_XXUGMK6_kernel.zip and Patched_XXUGMK6_modem.zip
network signal come back
tnx guys really
Click to expand...
Click to collapse
That kernel + that modem has risen up even Lazarus. HAHA.
efevelasquez said:
That kernel + that modem has risen up even Lazarus. HAHA.
Click to expand...
Click to collapse
What means this dude? The two files are too old?
You suggest me two different?

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