Database Develop

[Q] FIX Device ID: How?

Thanks to the good folks here i've just upgraded my Galaxy S to the leaked JPM firmware. So far so good - much faster than JPK I was on.
However - I'm having problems with the Appbrain Fast Web Installer and seem to have found out that it's due to the android device ID being the same because we're all using the same ROM (or something) (http://ip208-100-42-21.static.xda-developers.com/showthread.php?t=798644)
So.... How can I find out what my Device ID was/should be and how can I then change it to be "correct".
Any help much appreciated. Seems it might be a common issue....

Have you tried checking whether your IMEI changed after flashing? Type *#06# and if your IMEI starts with 0049... (I think...) then you need to do what almost everyone has been doing since JPC ... follow the instructions from here or some other threads from around here.
If your IMEI is fine, then I have no idea...

nonreviad said:
Have you tried checking whether your IMEI changed after flashing? Type *#06# and if your IMEI starts with 0049... (I think...) then you need to do what almost everyone has been doing since JPC ... follow the instructions from here or some other threads from around here.
If your IMEI is fine, then I have no idea...
Click to expand...
Click to collapse
Thanks for info - checked my IMEI and it seems to be fine - i.e. the one i registered with my insurance with (starts 3547)
I've read the thread you linked to trying to figure out what's what but I can't see anywhere how to find out what my product code is/was/should be or how I can change it. I've seen stuff about backing stuff up (nv_data?) but I'm not aware of having changed these.
All I've done to my phone - flashed JMX and now JPM and applied SuperOneClickv1.4-ShortFuse root. Will that have changed my product code?
I'm a bit lost with this one.

Use sgs toolbox to see the crc code.
Sometimes you got the right code in the backup file.
Just do a backup of all file on a safe place. The remove the 2 original file. Restart.
You need to be rooted for this.
Sent from my GT-I9000 using XDA App

DamianGto said:
Use sgs toolbox to see the crc code.
Sometimes you got the right code in the backup file.
Just do a backup of all file on a safe place. The remove the 2 original file. Restart.
You need to be rooted for this.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
A bit of info that might help(?):
I loaded up SGS toolbox and pressed ""check product code" it says:
---------------------
Got root access
Copied nv_data files...
nv_data.bin could not be read!
No backup .nv_data.bak found!
-----------------------------------------
I'm guessing that's bad news?!
Under Firmware Info it says:
------------------------------
PDA: I9000XXJPM
PHONE: I9000XXJPM
CSC: I9000OXAJPM
Build Info: 2010. 10
--------------------------------------
When I tap CSC selection it says: "USSD code running" and then "UNKNOWN APPLICATION"
When you say to backup 2 original files - i'm guessing it looks like I don't have those. Is there another way I can check or is it definite from the above. If I don't have the original files am I stuck? Can I get them from anywhere else? Are they default to a phone by region or carrier (my phone is from O2 in the UK and is the 8gb version)
If you say delete the original files (which aren't there it seems) - am I right in thinking this will them make the phone auto-generate new ones? (I really have no idea what these files are for or what they do).
What's the next thing to try? Can I get hold of the missing files from somewhere? Do I even need them? And how do I restore the Product ID (if it's changed!)?
Thanks

Have you checked the path manually for them?
If they are not there you are in deep water.
Its you personal data for the phone and you can't use others file.
Search this forum for help about this.
I can only give you a advice what i would do if i had that problem.
I would flash a original firmware that is lower than its on kies.
Then i would upgrade thought kies.
Then i would check if the crc code is there and right.
If it still wrong then i guess i would make the phone look like it was out of the box and return it.
If the code is right i would make a backup(full) and on this files( to my external sdcard).
Then i would upgrade to jpm/jp6.
Sent from my GT-I9000 using XDA App

DamianGto said:
Have you checked the path manually for them?
If they are not there you are in deep water.
Its you personal data for the phone and you can't use others file.
Search this forum for help about this.
I can only give you a advice what i would do if i had that problem.
I would flash a original firmware that is lower than its on kies.
Then i would upgrade thought kies.
Then i would check if the crc code is there and right.
If it still wrong then i guess i would make the phone look like it was out of the box and return it.
If the code is right i would make a backup(full) and on this files( to my external sdcard).
Then i would upgrade to jpm/jp6.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
Hi - thanks for reply
I've checked the /efs folder with Root Explorer and it seems i've got:
.android - folder
.nv2.bak
.nv2.bak.md5
.nv_data.bak
.nv_data.bak.md5
.nv_state
/imei - folder
nv_data.bin
nv_data.bin.md5
Now i'm guessing this is good? is it all in the right folder?
Just to clarify - I've never messed with this folder - I've only ever flashed with Kies and cleared the cache and restored factory settings with recovery. I've also formatted internal and external memory card.
So are these files my original files? How can I tell? Are these included with the Rom's I've flashed? (JPK and now JPM)
I've copied the entire efs folder to a safe place - is there anything else I should backup also incase I can't restore it?
SGS toolbox still says:
---------------------
Got root access
Copied nv_data files...
nv_data.bin could not be read!
No backup .nv_data.bak found!
-----------------------------------------
Why can't SGS toolbox read the files?
Many Thanks

Maybe I am not following this thread correctly, but your last post deals with IMEI and unlock data. Your first post said you needed to change your deviceID. You even link to the Captivate thread that discusses the problem AND in that captivate thread is a link to change Device ID - http://forum.xda-developers.com/showpost.php?p=8604909&postcount=3550
review that post as it tells you where your device ID is located (it is not in the nv_data.bin file). Also, in the captivate thread, one person said he just made one up and that worked for him.
If you mess up with nv_data.bin you will mess up your IMEI and any unlock the phone has - so I caution you be careful.

I made a thread with the solution
http://forum.xda-developers.com/showthread.php?t=815503
This should work.

alsheron said:
Hi - thanks for reply
I've checked the /efs folder with Root Explorer and it seems i've got:
.android - folder
.nv2.bak
.nv2.bak.md5
.nv_data.bak
.nv_data.bak.md5
.nv_state
/imei - folder
nv_data.bin
nv_data.bin.md5
Now i'm guessing this is good? is it all in the right folder?
Just to clarify - I've never messed with this folder - I've only ever flashed with Kies and cleared the cache and restored factory settings with recovery. I've also formatted internal and external memory card.
So are these files my original files? How can I tell? Are these included with the Rom's I've flashed? (JPK and now JPM)
I've copied the entire efs folder to a safe place - is there anything else I should backup also incase I can't restore it?
SGS toolbox still says:
---------------------
Got root access
Copied nv_data files...
nv_data.bin could not be read!
No backup .nv_data.bak found!
-----------------------------------------
Why can't SGS toolbox read the files?
Many Thanks
Click to expand...
Click to collapse
I had the same problem.
I installed Busybox from the App Market and it solved the problem.

abumuqaatil said:
I had the same problem.
I installed Busybox from the App Market and it solved the problem.
Click to expand...
Click to collapse
thanks...had same problem and that solved it

[Q] URGENT! IMEI screwed, need help to restore!

Hey, I got some problems. Posted in another forum, but it's very urgent so I post it here to. Just quoting what I previously posted.
Hey, flashed the JVS modem on top of the Chameleon Final. Didn't get any signal and the baseband version in settings stated "unknown". Tried another modem, JVO and flashed back to Chameleon modem, still not fixed. Also tried to wipe everything and install rom again... did not help either. Odin didn't report any errors whatsoever.
Desperate for some help her guys!
Click to expand...
Click to collapse
Got reply that my IMEI was screwed, and replied:
[quote author=bahafeld link=topic=1931.msg13081#msg13081 date=1316107492]
Okey, I have backup of my original EFS folder. Isn't it there the IMEI is saved? can I just copy it over again with Root Explorer?
Please help me out here. All the guides I've found have the EFS saved in a .tar format. However I just backed up the EFS folder with root explorer. Anyone know I can recover my EFS, tried just copying it back, but that did not work.
Its kinda urgent!
[/quote]
So I hope you guys at XDA can help me a bit faster.
Thx
bahafeld

if you have a .tar version of your EFS. Unzip it. Copy all the contents of it, And paste them to the /EFS on the phone. Making sure they overwrite the current contents.
Once that has done, Restart the phone without backing out of root explorer (or what ever app you are using to copy/paste these files).
If that fails, Repeat the above step but ONLY copy / paste the NV_data.bin & NV_data.bin.md5
And finally if that fails. Backup all your stuff using Titanium Backup (or similar) And re flash a stock Froyo ROM. Maybe older, its upto you.
That will Definitely restore the IMEI, Then re-root and go back to whatever ROM you wish.
Good luck.

[ H E L P ] EFS folder and files needed!!! Phone bricked!!!

Hi! Anyone can upload EFS folder \efs) ? You can attach as zip file. Doesn't matter, it's important to be there all files.
I bricked my phone and I want to unbrick. Please, anyone who is experimented, please help me!
Best Regards,
Cristian Silaghi

NO one found this folder on the galaxy mini....the phone can turn on or not?? if yes u can unbrick...

efs folders are unique you have just removed your imei now if you don't have your own backup nothing can be done
now your mobile is a mp4 player if anyone uploads his efs file his mobile will also be a mp4player

dheeraj (dhlalit11) said:
... if anyone uploads his efs file his mobile will also be a mp4player
Click to expand...
Click to collapse
Just because you're a Recognized Contributor, that doesn't mean you can bull****.
That is not true! Admit it, you don't know how pull the /efs ot from your phone
Like you said, /efs folder contains alot of things that are unique for each phone (WiFi MAC adress, IMEI, product code and what not), so we can't just give someone our /efs. Even if we could, the way of pulling those files from the phone are not known to me.
Wish we knew a way to backup it, when something like this happens - you just put the backup and away you go

just because am an rc that doesn't mean am bullying
nothing difficult in backing up efs file just go to /efs and copy those files to your sdcard and they will be backed up
but efs is visible only in operator specific models in normal phones imei is hardcodded in the mobile
mine galaxy s is of at&t and I can see the efs folder, prior of flashing roms on it I did a backup of that folder
and sometimes it got deleted then I just need to copy them back
can't see on original galaxy s of my friend
the thing is one imei cannot be used in two mobile there can be many conflicts and some also related to laws
only one sim can be used at a time on a single imei
that's why I said mp4player but you can still try to share your efs files if it works then just keep it else delete it

op if you have your operator specific firmware and it contains an efs.rfs file then you may have the possibility of getting back your imei
just try it, may work

dheeraj (dhlalit11) said:
just because am an rc that doesn't mean am bullying
nothing difficult in backing up efs file just go to /efs and copy those files to your sdcard and they will be backed up
but efs is visible only in operator specific models in normal phones imei is hardcodded in the mobile
mine galaxy s is of at&t and I can see the efs folder, prior of flashing roms on it I did a backup of that folder
and sometimes it got deleted then I just need to copy them back
can't see on original galaxy s of my friend
the thing is one imei cannot be used in two mobile there can be many conflicts and some also related to laws
only one sim can be used at a time on a single imei
that's why I said mp4player but you can still try to share your efs files if it works then just keep it else delete it
Click to expand...
Click to collapse
Things on Galaxy S and on our mini are a little bit different for that /efs matter, because nvdata.bin is in devblock5 or something like that, an on Galaxy S it's in a different place. Strange, but it is that way, i tried all the Galaxy S tutorials to make a backup and none of them worked.
And yeah, you cant just copy the folder since that will **** up th permissions and then the files are almost useless.
Yeah, he has a great MP4 now, unfortunately :/
I know imei is unique, thats why i said ''if we could give our efs''

just copying the efs files works great for me
I never changed permission of efs files
and had done it three times by just copying

If you distroy your IMEI becouse of bml/efs you can repair it with JTAG. Write full dump then repair its IMEI (to be the one from you stiker). Generaly this is a Service job becouse you dont't have the necessary tools.

i don't have this /efs folder, but i still can browse internet, call my friends, do a SMS, play music. Just like a normal phone do.

F4uzan said:
i don't have this /efs folder, but i still can browse internet, call my friends, do a SMS, play music. Just like a normal phone do.
Click to expand...
Click to collapse
if you cant see that doesn't mean you don't have efs
it is just that you cannot see it like you cannot see bootloader, kernel etc.

HELP - CM10 upgrade and lost IMEI

Need some help here, hopefully without having to go back to JF6 (that is a little scary at this point). Was pretty happy with CM9 and updated through most nightlies. Just today I upgraded to CM10. All seemed to be working well except that I received a warning of invalid IMEI. I pushed through it and had the phone working on CM10 (with low memory /data isses - that could later be rectfied) then realized that the IMEI issue would mean AT&T would likely shut my phone down. The invalid IMEI is generic and has been flagged as invalid. I also ran into a few issues where I could not download from the Play Market App and think this was the reason.
I nandroid backed up CM10 and restored CM9 but still no dice. As I learned later it doesn't touch the efs folder which somehow the CM10 upgrade modified or had the effect to change it. Uuughh. many others were having the issue.
Anyway, I have verified that there are no /efs backups anywhere on my phone or SC or emmc cards. There are no backups within the efs folder. So, I am hosed. Any way to edit the nv_data.bin file a la this process for either CM9 or CM10?
http://forum.xda-developers.com/showthread.php?t=881162&highlight=restore+imei
This seems to be the only way I can see that would get me back with no IMEI EFS backup. But, going back to Android 2.1 Eclair or 2.3.5 Gingerbread would be a time killer and have to go through rerouting (?), upgrading, etc.
Any thoughts or direction?

tonyo123 said:
Need some help here, hopefully without having to go back to JF6 (that is a little scary at this point). Was pretty happy with CM9 and updated through most nightlies. Just tpday I upgraded to CM10. All seemed to be working well except that I received a warming of invalid IMEI. I pushed through it and had the phone working well then realized that this is an issue where AT&T will likely shut my phone down. The invalid IMEI is generic and has been flagged as invalid. I've also run into a few issues where I cannot download from the Play Market App although not sure if this is the reason.
I backed up jCM10 and restored (CEM NANDROID) CM9 but still no dice. As I learned it doesn;t tough the efs folder which somehow the CM10 upgrade modified or had the effect to change it - although I understadn the ROM is not supposed to do this but I see many having the issue.
Anyway, I have verified that there are no efs backups anywhere on my phone or SC or emmc cards. There are no backups within the efs folder. So, I am hosed. Any way to edit the nv_data.bin file a la this process for either CM9 or CM10:
http://forum.xda-developers.com/showthread.php?t=881162&highlight=restore+imei
This seems to be the only way I can see that would get me back with no IMEI EFS backup. But, going back to Android 2.1 Eclair would be a killer and have to go through rerouting (?), upgrading, etc.
Any thoughts or direction?
Click to expand...
Click to collapse
Go Stock with rooted KK4 and flash what ever rom you want after.
http://forum.xda-developers.com/showthread.php?t=1358180

Okay
silvertag said:
Go Stock with rooted KK4 and flash what ever rom you want after.
http://forum.xda-developers.com/showthread.php?t=1358180
Click to expand...
Click to collapse
All right it was a long painful night and day. Found and downloaded Heimdall One Click .jar with UCKK4 GB. Ran it and it restored the correct IMEI. It was unrooted and stock.
Then what was previously easy became an adventure to root and and load a kernel with CWM. I must have bricked the phone 10 times havimg to redo the Heimdall to Gingerbread 2.3.5 numerous times including reloading samsung pc drivers. Eventually with Odin, I found the right sequence using Corn Kernel for UCKK4 703 injected with CWM (not 705 or 706 versions which kept failing) which allowed me to get CWM loaded onto the phone.
I still could not restore my CM9 nandroid backups as the /data restore kept failing having to redo things from scratch. So, then I copied the latest CM9 nightly .zip onto the internal SD then loaded it from the Corn-CWM restore. CM9 booted and things were better but phone nad none of the settings and things still not right. Then rebooted into CWM recovery and restored the last CM9 nandroid backup. Now things worked and everything was back to normal with the correct IMEI.
Man that was a long stressing and scary day...
Made multiple copied of EFS for the future.
Will hold off on CM10 until the /efs issue is resolved as well as the memory management is better understood (while on CM10 I immediately ran into /data out of memory problems (I know I needed to move things to SD but never got around to it once the IMEI issue came up).
So, all is back to CM9 and finally working fine

odin to stock, then you will get imei back, backup efs folder, and flash back to cm10.

I have the same problem, but i'm om Rogers and 5 days now and no problems yet. I have a backup of my efs folder can I just copy paste?

master2828 said:
I have the same problem, but i'm om Rogers and 5 days now and no problems yet. I have a backup of my efs folder can I just copy paste?
Click to expand...
Click to collapse
Yes just make sure you set the correct permissions on the files. BTW You won't have a problem on Rogers. Canadian providers have all their black listed (lost/stolen) imei separated. They don't share it so a black listed imei on Rogers will work on Bell or Telus and vice versa. Only thing is that your phone can no longer be tracked by imei in case of emergency since its not the correct information but E911 will still locate you via GPS if you ever place a call.

silvertag said:
Yes just make sure you set the correct permissions on the files. BTW You won't have a problem on Rogers. Canadian providers have all their black listed (lost/stolen) imei separated. They don't share it so a black listed imei on Rogers will work on Bell or Telus and vice versa. Only thing is that your phone can no longer be tracked by imei in case of emergency since its not the correct information but E911 will still locate you via GPS if you ever place a call.
Click to expand...
Click to collapse
Cool, thanks, what are the correct permissions? if i run fix permissions from kernel will that do the trick?

master2828 said:
Cool, thanks, what are the correct permissions? if i run fix permissions from kernel will that do the trick?
Click to expand...
Click to collapse
That should do
EDIT: Checked my settings on nv_data.bin and its 777 (everything checked in RootExplorer)

silvertag said:
That should do
EDIT: Checked my settings on nv_data.bin and its 777 (everything checked in RootExplorer)
Click to expand...
Click to collapse
So where exactly do i put the efs folder? I looked on the root of my phone and i dont see a efs folder currently, i tried to put the backup i have there but it didnt work still go the error. i dont even know how i got the backup i have actually lol, i just copied my whole phone contents to my pc before i wiped just in case and there is an folder /backup/efs...lucky i guess

master2828 said:
So where exactly do i put the efs folder? I looked on the root of my phone and i dont see a efs folder currently, i tried to put the backup i have there but it didnt work still go the error. i dont even know how i got the backup i have actually lol, i just copied my whole phone contents to my pc before i wiped just in case and there is an folder /backup/efs...lucky i guess
Click to expand...
Click to collapse
It sounds like you have the backup that is sometimes made in the /sdcard (or /mnt/sdcard) folder, which is the internal storage you see when it's connected to your machine.
To see the /efs folder (assuming it exists), you would need to use either shell commands from inside ADB, or a root file explorer. If it's not there, you should just be able to dump the contents of that backup folder to a directory called /efs and go from there.

[Q] Missing /efs folder yet phone works

Hi All,
like many of the users I have a problem with missing /efs folder. Although I can't find it I have my IMEI and my phone (S5830) works fine. I can make and receive calls.
But let's start from the beginning. I had Android in 2.3.3 version.
Using this post http://forum.xda-developers.com/showthread.php?t=1034145 I have upgraded it to 2.3.6.
I have also rooted it using universal_gb_root_v25.zip.
Now I wanted to play with it a little more so I though of doing backup. Previously I made one using CWM but I read that it doesn't backup /efs folder that stores IMEI and other important data. So I started searching through the forum for a solution. I've downloaded EFS Professional but for some reason it gives me error "An error occured while getting partition list!" when I select my phone from the drop-down list on the backup tab. I cannot do backup because the "Device Partitions" window is empty.
I did not give up and searched the forum a little more. So I've downloaded two apps: ES File Explorer and Root Explorer. Unfortunately both could not locate /efs folder. All the Linux folders were there except /efs. There's dev and next is etc. No efs.
So I though that maybe the folder was hidden but the I checked the options of Root Explorer to show hidden files.
Lastly I checked the method with adb shell and busybox like below:
adb shell
su
tar zcvf /sdcard/efs-backup.tar.gz /efs
but as I though I got the message that /efs folder could not be found.
Has anyone have an idea how to get to /efs folder in my case? Where does my phone keep IMEI? How to backup (and restore) my phone in this scenario? Is there any other way to backup the most important files?
I know there are lot of questions but I'd appreciate helping me with it. Thanks in advance.

habit81 said:
Hi All,
like many of the users I have a problem with missing /efs folder. Although I can't find it I have my IMEI and my phone (S5830) works fine. I can make and receive calls.
But let's start from the beginning. I had Android in 2.3.3 version.
Using this post http://forum.xda-developers.com/showthread.php?t=1034145 I have upgraded it to 2.3.6.
I have also rooted it using universal_gb_root_v25.zip.
Now I wanted to play with it a little more so I though of doing backup. Previously I made one using CWM but I read that it doesn't backup /efs folder that stores IMEI and other important data. So I started searching through the forum for a solution. I've downloaded EFS Professional but for some reason it gives me error "An error occured while getting partition list!" when I select my phone from the drop-down list on the backup tab. I cannot do backup because the "Device Partitions" window is empty.
I did not give up and searched the forum a little more. So I've downloaded two apps: ES File Explorer and Root Explorer. Unfortunately both could not locate /efs folder. All the Linux folders were there except /efs. There's dev and next is etc. No efs.
So I though that maybe the folder was hidden but the I checked the options of Root Explorer to show hidden files.
Lastly I checked the method with adb shell and busybox like below:
adb shell
su
tar zcvf /sdcard/efs-backup.tar.gz /efs
but as I though I got the message that /efs folder could not be found.
Has anyone have an idea how to get to /efs folder in my case? Where does my phone keep IMEI? How to backup (and restore) my phone in this scenario? Is there any other way to backup the most important files?
I know there are lot of questions but I'd appreciate helping me with it. Thanks in advance.
Click to expand...
Click to collapse
its difficult to find the efs folder bt u can check ur IMEI number by this code *#06#.
you can backup efs files by efs professional tool.
a CWM backup is also safe as it includes most of important files.
hit thanx if helped.

its difficult to find the efs folder bt u can check ur IMEI number by this code *#06#.
Click to expand...
Click to collapse
I was clever enough to write down my IMEI before but this is not an issue. The phone works fine.
you can backup efs files by efs professional tool.
Click to expand...
Click to collapse
I already wrote that I'm getting an error "An error occured while getting partition list!" using EFS Pro
Anyone has other ideas?

habit81 said:
I was clever enough to write down my IMEI before but this is not an issue. The phone works fine.
I already wrote that I'm getting an error "An error occured while getting partition list!" using EFS Pro
Anyone has other ideas?
Click to expand...
Click to collapse
forum.xda-developers.com/showthread.php?t=1637249 may this thread help u

forum.xda-developers.com/showthread.php?t=1637249 may this thread help u
Click to expand...
Click to collapse
Thanks for the one above. From this post I read that SGA does not have /efs (folder/partition) or it is not mounted by default so I can't see it. Which one is the right answer? It does not exists or it is not mounted?
If doesn't exists then where should I look for IMEI data and all other critical stuff?
If it exists I could issue:
mount -r -t ext4 /dev/block/mmcblk0p3 /efs
-r not to make any changes. I would have to create /efs folder first using: adb shell mkdir /efs
Am I following the right path?
I'd have already tried that but don't want to screw up my phone. Thanks in advance for any suggestions.

habit81 said:
Thanks for the one above. From this post I read that SGA does not have /efs (folder/partition) or it is not mounted by default so I can't see it. Which one is the right answer? It does not exists or it is not mounted?
If doesn't exists then where should I look for IMEI data and all other critical stuff?
If it exists I could issue:
mount -r -t ext4 /dev/block/mmcblk0p3 /efs
-r not to make any changes. I would have to create /efs folder first using: adb shell mkdir /efs
Am I following the right path?
I'd have already tried that but don't want to screw up my phone. Thanks in advance for any suggestions.
Click to expand...
Click to collapse
I can suggest you
DON'T TOUCH/MOUNT ESF FOLDER AND DON'T TRY TO BACK UP IT EITHER,DOING IT = BRICK!!

I can suggest you
DON'T TOUCH/MOUNT ESF FOLDER AND DON'T TRY TO BACK UP IT EITHER,DOING IT = BRICK!!
Click to expand...
Click to collapse
Thanks for the suggestion however this doesn't bring any useful information to this topic. I already know to be very careful with EFS data.
I would like to get some answers about configuration of this data on SGA. I would like to know whether there is a way to back it up That's all

habit81 said:
Thanks for the suggestion however this doesn't bring any useful information to this topic. I already know to be very careful with EFS data.
I would like to get some answers about configuration of this data on SGA. I would like to know whether there is a way to back it up That's all
Click to expand...
Click to collapse
I think it's useful...anyway It's really simple, FORGET TO BACKUP YOUR EFS FOLDER OR YOU'LL BRICK YOUR PHONE!!

First... the question is why would you wanna backup your IMEI ? You needn't even write it down as a backup if you have the bill of your phone. And in case if you ever lost the IMEI, there is a guide to restore it & you can restore your older IMEI. So why worry to backup ?
Sent from my GT-S5830 using xda premium

I wrote the IMEI down just as a precaution. I didn't know it was on the bill as to be honest the phone used to belong to my wife. I know there are several threads about restoring IMEI and other necessary data. I have already viewed them.
The reason I put this thread was that I was unable to locate the famous efs folder. I'm new in this stuff but I'm also a quick learner. After going through several threads and articles I was curious why I could not locate efs folder on my SGA. Answers such as "don't look for it or you will damage your phone" are just simply not what I was looking for. Anyway if someone please explain me the technical details of this phone and the reason why I can't make a backup using several tools and methods I would be very grateful.

Your quest for the efs folder is unending. I appreciate your effort in learning new things but what's the point of finding something that's of no practical use ? Yeah, you can't find the efs folder & no one else has ever worried about it coz everyone knows how to get their phone back online when they lose their IMEI. So either backing it up or looking for it is not worth a penny . All that counts is that the phone works & that the IMEI is secured, be it without that folder of your interest. If you clearly state your intentions with what you have to do by backing it up, someone might be able to help.
Sent from my GT-S5830 using xda premium

Hi I am have just joined the forum searching for a help. It was my first time flashing custom roms and had been at fault in technically missing some of the instruction. I have failed to backup any bin, img or efs folder which could help me fix IMEI. using MTK droid tool (for MT6589), I am receiving an error of missing pttycmd1 and even searching the root of my phone, I can't find any nv_ram or efs. Is there any other way to fix my device?
Baseband: Unknown
No IMEI
cannot use AT+egmr command
thanks for the reply.

efs ?
efs is a partition for sim unlock right ?

i do hope so, because I just read from other threads about exploring and backup of efs can fix baseband & imei.

I can't find my efs either. The issue I'm having is to get rid of Factory Mode. Have seen tutorials on how to do it, but the efs file is missing and so I can't actually do it. Any suggestions on how to fix these issues? Thanks