Database Info

[Q] Imei corrupt....how to fix it?

After unlock success phone imei is come to this condition
{
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
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"lightbox_download": "Download",
"lightbox_share": "Share",
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}

What unlock did you use? What are you doing when you receive this message? Is you phone rooted or any other mods? What have you tried so far to fix it?

I used NsPro to unlock my phone and to fix this imei issue i used odin 1.7 to flash the phone with T959VKB5-Custom.tar but after flashed it same thing, help me how i can solve this problem?

No body can help me to solve my problem??????

Are you trying to dial when you receive this message, or the message just comes at any time you turn the phone on?
Have you tried factory data reset?

golmar88 said:
Are you trying to dial when you receive this message, or the message just comes at any time you turn the phone on?
Have you tried factory data reset?
I'm not real familiar with nspro, how does that work? Does it mess with JTAG?
Click to expand...
Click to collapse
Hi
I have same like ur problem.
did u managed to fix it ?

amanvir said:
I used NsPro to unlock my phone and to fix this imei issue i used odin 1.7 to flash the phone with T959VKB5-Custom.tar but after flashed it same thing, help me how i can solve this problem?
Click to expand...
Click to collapse
ns pro never corrupts the imei of galaxy s 4g. {t959v}. I ve unlocked many such galaxy 4gS.
IMEI corruption had occured must be due to incorrect ( ' i9000 modem unlock patch file') flashing with z3x followed by a repair attempt with the ns pro modem repair file. AND then some desperate attempts with ODINs also.
So many files now on board - try your luck OR wait for a pro solution to be released.
br

let me know if you found a fix, im in the same boat and cant get it back

any fix for this?

hi xda'er got this problem before just want to share it what i did is search nv_data.bin in this case i use root explorer navigate to that folder see if you have these files nv_data.bin nv_data.bin.md5 the other two is a back up file .nv_data.bin.bak and .nv.data.bak.md5 ( correct me if im wrong ) i copied that files to my sd and then i deleted the nv_data.bin nv_data.bin.md5 rename the back up files to nv_data.bin nv_data.bin.md5 see if ur ime change if not do the soft reset shut down ... take off battery ... wait 30 sec and turn it back on hope this will help ( sorry 4 my bad english )

kenzo888 said:
hi xda'er got this problem before just want to share it what i did is search nv_data.bin in this case i use root explorer navigate to that folder see if you have these files nv_data.bin nv_data.bin.md5 the other two is a back up file .nv_data.bin.bak and .nv.data.bak.md5 ( correct me if im wrong ) i copied that files to my sd and then i deleted the nv_data.bin nv_data.bin.md5 rename the back up files to nv_data.bin nv_data.bin.md5 see if ur ime change if not do the soft reset shut down ... take off battery ... wait 30 sec and turn it back on hope this will help ( sorry 4 my bad english )
Click to expand...
Click to collapse
Hi Kenzo888, Upon searching I do not have the .nv file or the or the md5 file either. All I see is the nv_data.bin file in the /efs/root folder and one /efs folder.
I am not sure if the others have the same but I have the same exact IMEI shown in the OP (1st post by amanvir).
Hope someone can help.

dude_uuk said:
Hi Kenzo888, Upon searching I do not have the .nv file or the or the md5 file either. All I see is the nv_data.bin file in the /efs/root folder and one /efs folder.
I am not sure if the others have the same but I have the same exact IMEI shown in the OP (1st post by amanvir).
Hope someone can help.
Click to expand...
Click to collapse
Try efs/root/afs/setting all my nv files
Is in that folder

kenzo888 said:
Try efs/root/afs/setting all my nv files
Is in that folder
Click to expand...
Click to collapse
I only have two nv files (nv_dat.din and nv_data.binrm) from that directory. I read from the other forum threads that using nspro for unlocking screwed their IMEI as well showing the same IMEI from the first post. gosh!!!

dude_uuk said:
I only have two nv files (nv_dat.din and nv_data.binrm) from that directory. I read from the other forum threads that using nspro for unlocking screwed their IMEI as well showing the same IMEI from the first post. gosh!!!
Click to expand...
Click to collapse
Ok try this thread and letit sit for 10 mnt and then soft reset it
http://forum.xda-developers.com/showthread.php?t=1142829

dude_uuk said:
I only have two nv files (nv_dat.din and nv_data.binrm) from that directory. I read from the other forum threads that using nspro for unlocking screwed their IMEI as well showing the same IMEI from the first post. gosh!!!
Click to expand...
Click to collapse
U sure that ur files is nv_dat.din and nv_data.binrm ?

I had this problem and it is because the app is supposed to take the nvdata.bin out change the codeing to make the phone unlocked and then it puts the file back in the phone and your unlocked. If it is not there then the app failed to restore the .bin and thats why u have no imei. Find the file and push it back with the adb method for unlock. I do not like these unlocking apps. they can cause too much bs if they do not operate properly. I use adb to extract the file to my sd card and then place on desktop and edit the file with a hex editor. U only have to change a few 0's to 1's or vice versa and its super easy if u follow the thread about how to unlock the sgs 4g with this method. (can't remember which one but it is in our forum for sure) Then u push your nvdata.bin back to the phone with adb and ur unlocked. To relock the phone u do the same method and change back what u changed to unlock it. ( 0's to 1's or vice versa. just read the thread.)

kenzo888 said:
Ok try this thread and letit sit for 10 mnt and then soft reset it
http://forum.xda-developers.com/showthread.php?t=1142829
Click to expand...
Click to collapse
Hi did this already and now i have the 2.3.3 GB from 2.2.1 but still my IMEI is screwed up. Did the soft reset as well but still nothing.

kenzo888 said:
U sure that ur files is nv_dat.din and nv_data.binrm ?
Click to expand...
Click to collapse
yup...I have searched for al nv files but this is only the two files I have in that folder (/efs/root/afs/setting).

Please help
I'm kind of in the same boat.
I bought a phone off craigslist didn't work now im stuck with a phone i can use wireless on. attempting to make a call, the call drops instantly , received calls go straight to voicemail.
after researching all this past week.. i've noticed the following probles so here is my situation at hand.
i have the IMEI issue with corrupted characters except mine says 04 at the end.
unable to root.
unable to put this phone in download mode
(attempting to fix the imei issue reflashing with odin)
I have no back up files
unable to enter recovery mode manually. I read from another thread someone was able to do so using t mobile one click root program for vibrant ,
which works for this, but when i tried to root i get e signature verification fail issue as well.
I've read countless threads and forums and about to inquire to samsung or t-mobile for a repair. my aim is to get this phone operable.
i'd like to help myself on the issues but find myself at a dead end with being unable to put in download mode ,and yes ive tried the different methods of holding buttons/ inserting usb.
and at another dead end being unable to get this rooted because of signature verification fails.. any help or direction would be greatly appreciated.

are the files device specific? cuz if not i had same problem and i fixed it...i will post file if not device specific, someone just let me know.

[A] Simple Mobile APN Problem fixed

Okay, here it is as promised. You need Clockworkmod Recovery installed but you don't need to be rooted to flash the zip.
I have created a flashable zip file to replace the stock apns-conf.xml with one that has settings for Simple Mobile. What I have done is made an apns-conf.xml file that has settings for virtually every gsm carrier worldwide with the main TMO settings changed to Simple Mobile settings. I wanted to have it backup the current one also but the Edify scripting language used by Clockworkmod Recovery doesn't have support for moving or copying a file. So if you want to back up the file first there are two ways. If you are rooted just use 'Root Explorer' and copy the file and then paste it back to the same directory (change to R/W first). The backup will show as apns-conf-copy.xml. The other way (root not required) is to connect to the phone by ADB and issue the following adb command:
> adb pull /system/etc/apns-conf.xml apns-conf-backup.xml
[Make sure the directory you are issuing the adb command from is not read only and you have full modify permissions if you are using Windows.]
To restore the file you can just use Root Explorer to delete the new one and then rename the copy back to apns-conf.xml. If you copied the original to your computer using adb then just change the backup to apn-conf.xml and use 7-zip to replace it with the one in my zip file and flash the zip package again. That will restore your original file.
I made two flashable zip packages. Both are flashed using Clockworkmod Recovery. Put the desired file on your internal or external sd card and flash it, then reboot. Afer rebooting go into Settings, Wireless & networks, Mobile network settings, Access Point Names. Click the menu button and then select "Reset to default." Then select the radio button for Simple Mobile to turn the selection green. T-Mobile will still show but the change to Simple Mobile should be persistent even if you shutoff or reboot the phone. If you change the sim you might need to select the Simple Mobile apn again (only first time). This apn setting is for internet and mms with Simple Mobile.
apns-4-simple.zip: Worldwide apn settings with Simple Mobile instead of TMO.
Download Link: http://www.mediafire.com/?8rovq05g7is2txs
MD5 checksum: 4db59ceeae1d80f14ca2d44ef04e61ed
apns-4-GB-stock.zip Restores the stock Gingerbread G2X file which has no settings for any carrier. TMO, Wind and Videotron are set elsewhere in the rom.
Download Link: http://www.mediafire.com/?lcxlg23tsk6cc46
MD5 checksum: bb7ef684edb88a69e831a20828a4ca4a
I tested this myself with an old T-Mobile sim I have. It worked and the change was persistent after rebooting and shutting off the phone.
This should fix your data connectivity problems.
Please note: If you have a stock rom this will prevent future OTA or LG Updater updates. Use the "apns-4-GB-stock.zip" to restore the file to stock GB T-Mobile G2X and then OTA and LG Updater updates will work. If you have a stock Froyo rom use one of the methods above to backup your original file so you can restore it later if you want to get an OTA or LG Updater update.
Enjoy!

THANK YOU
Hi jboxer,
Thank you very very much.. Its been quite a while I did adb and stuff the last time I did it was with HD2 last year I need to refresh my skills..
Anyways the phone is not with me and I will go home in the evening and try this fix and let you know..
Thank you very much for such detailed steps and description.
I will let u know how it goes as soon as I try it..

anush.isaac said:
Hi jboxer,
Thank you very very much.. Its been quite a while I did adb and stuff the last time I did it was with HD2 last year I need to refresh my skills..
Anyways the phone is not with me and I will go home in the evening and try this fix and let you know..
Thank you very much for such detailed steps and description.
I will let u know how it goes as soon as I try it..
Click to expand...
Click to collapse
It would have been nice to get some feedback after making the effort to fix this problem for you Simple Mobile users. anush.isaac, you said you would let us know as soon as you tried it out and we have been waiting four days now for your update.

question: What is APN? What does it do, and why does it need to be fixed. Sorry noob question. Im slowly learning about the android system. Some feedback would be nice. One more question: This works on T-Mobile???
*edit I just googled it.......can someone explain it to me in english, lol. I felt like I was reading in a different language.

Have the Same Problem
Hey all,
I was reading up and I have the same problem with my G2x.
I would like to try to use the solution that you provided but I have never done any rooting or modifying to my phone. I am not sure how to install the clockwork mod that you mentioned.
I only have access to a mac and in my experience that usually stops most attempts to modify my phone or other phones.
where can i find simple instructions on how to apply the flashable zip package and perform the Adb (not sure what this is)
Thanks in advance,
RR

Originally Posted by oceandographer
Well the settings from their site were correct. The android configuration is what was needed. It's not obvious how you activate the APN though. The technical support rep helped me figure it out but even he was like, "You have to get the green dot on that new APN. Try to drag it or just touch it.." Well you have to touch the radial button where the green dot should go, however, that is not good enough. You have to hold it down for awhile. Just the button. Then you get the green activation dot. There you have it.
Thanks for the help. You were correct, as was my assumption.
g2x activation at simple mobile.
Simple Mobile website--> Enter in Android config on a new APN--> Save and hold down the radial button long enough for it to turn green. From there, internet, gps, mms, etc. all work.
Ocean .. you are AWESOME. it worked like a charm , i kept searching around until i found your post, i'm gonna post this in another thread on here about the same issue if you don't mind. i'm sure many people are experiencing this issue
glad i didn't have to root ..why? my name says it all
ps. just make sure you do the drag first a couple of times "it wont actually drag the dot" but just do it a few times then hold like Ocean said until it turns green , i held it for 15 seconds at least

Sorry
jboxer said:
It would have been nice to get some feedback after making the effort to fix this problem for you Simple Mobile users. anush.isaac, you said you would let us know as soon as you tried it out and we have been waiting four days now for your update.
Click to expand...
Click to collapse
Hi jboxer,
I really apologize for not being able to get back to you quickly. I was help up at work for the past few days and could not try anything.
I have not Rooted a G2X before and I am a little concerned on how to do it. I did read the Instructions on this form but it is a little confusing. Let me confirm this with you, To apply your fix I know I need to Root the phone but is there another way without rooting the phone as I am afraid I might brick the phone.
Also In order to root the phone I followed this link http://forum.xda-developers.com/showthread.php?t=1255214 . So I just need to install the CLOCKWORK MOD RECOVERY and flash the root zip??
The phone is my Girlfriend's so I don't have access to it all the time.. I once again apologize for the late reply..

anush.isaac said:
Hi jboxer,
I really apologize for not being able to get back to you quickly. I was help up at work for the past few days and could not try anything.
I have not Rooted a G2X before and I am a little concerned on how to do it. I did read the Instructions on this form but it is a little confusing. Let me confirm this with you, To apply your fix I know I need to Root the phone but is there another way without rooting the phone as I am afraid I might brick the phone.
Also In order to root the phone I followed this link http://forum.xda-developers.com/showthread.php?t=1255214 . So I just need to install the CLOCKWORK MOD RECOVERY and flash the root zip??
The phone is my Girlfriend's so I don't have access to it all the time.. I once again apologize for the late reply..
Click to expand...
Click to collapse
No, you DO NOT need do root the phone to apply this. I stated that in my original thread and in others. You just need to install Clockworkmod recovery, boot into Clockworkmod and flash the APN zip and follow the instructions to restore to default apn settings. That's it. If you want to root then you can also flash the root zip at the same time or another time. The choice is yours and solely up to you.

Thanks
All day I've been trying to get the correct APN set up..and I come across your easy flash zip. It worked fine on my G2x and I have data! Thanks

dokjon said:
All day I've been trying to get the correct APN set up..and I come across your easy flash zip. It worked fine on my G2x and I have data! Thanks
Click to expand...
Click to collapse
Glad to help. Please click me a Thank You.

I've installed the zip and have followed the instructions over and over again, but somehow it keeps dropping out. i just upgraded to GB today (should have stayed with FY). the apn just keeps resetting to TMO over and over, my phone is completely screwed on data now thanks to GB. either way, anything you think i can do about the anp issue?
it just keeps failing or saying the connection timed out.

blink6966 said:
I've installed the zip and have followed the instructions over and over again, but somehow it keeps dropping out. i just upgraded to GB today (should have stayed with FY). the apn just keeps resetting to TMO over and over, my phone is completely screwed on data now thanks to GB. either way, anything you think i can do about the anp issue?
it just keeps failing or saying the connection timed out.
Click to expand...
Click to collapse
If you install my APN zip file the problem should go away. Once this is installed the APN has the same status as the TMO one so the phone should not want to switch back to TMO any more.

Im gonna give you guys another solution that does not involve flashing anything. I had this exact problem and here is what i did to fix. Blv me after you read this you wont believe it. Plus with the described methods in this forum about this issue, if you ever have to reset your phone, you will be back to the same problem again...having to flash that xml file.. read on..
First you need to get an unlock code for SIM unlock. I paid $2.80 on ebay for unlock code from unlock_fusion. Really cheap. You will not be able to create and save a new APN without the phone being unlocked. Now the default APN in the LG G2x is "T-MOBILE US" and you cannot delete it. Even if you root or unlock it cannot be removed. If you create the simple mobile APN as described in a matter of minutes it switches back to the tmobile APN which is a real pain in the a$$. The simple solution is to create another APN and name it exactly as your default APN which is "T-MOBILE US". Viola! Dont worry, it will allow you to save it with the same name but inside that APN you have the simple mobile configuration. It works without flashing anything. I added one thing extra to the simple mobile config APN type: default,mms,ota,agps
Thats it. you dont really have to add that but I did.
Note: This problem shows up after updating to android 2.3.3. before that, a simple unlock and adding the simple mobile APN worked fine.
Note:
to unlock requires that you put a sim card from a different carrier other than t-mobile for this phone. Also using the simplemobile sim card wont bring up the screen that asks for the sim unlock code. Use an AT&T sim card.. just borrow one from a friend. For those of you that dont know, simple mobile is what is called an MVNO (mobile virtual network operator) of t-mobile. They resell t-mobile's network which is why your 3G and 4G still works on simple mobile or any t-mobile phone that is used on simple mobile. You can also use a sim card from h2owireless as they are an MVNO of AT&T. So with that said, insert a different sim card and turn on the phone and you will see the screen come up asking for the unlock code. Do not enter anything that is not a real unlock code as too many tries will lock you out.
{
"lightbox_close": "Close",
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"lightbox_full_screen": "Full screen",
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THANKS!
(I don't know, or can't find the "thank you" ikon on the page)

Found a fix that worked for me.
Nothing listed here fixed this issue for me. I eventually ran across APN Manager on the market. It works with root access and gives you full control over the APNs. I just made a backup then deleted the T-Mobile default one and now only Simple is there and always active.

simple
txnr70 said:
Nothing listed here fixed this issue for me. I eventually ran across APN Manager on the market. It works with root access and gives you full control over the APNs. I just made a backup then deleted the T-Mobile default one and now only Simple is there and always active.
Click to expand...
Click to collapse
John,
Funny its only you with that problem. Ive helped so many friends with this phone and the same problem and its resolved with what i posted. No root access needed. Only unlock code required and its cheap enough. Did you get unlock code for your phone? because you cant do what I posted (see picture link in my post) with out unlocking first. Please post exactly what changes you made because i dont think there is a root solution for the G2x/android 2.3.3. Post exactly what you did in the app you installed. thanks

pcdocta said:
John,
Funny its only you with that problem. Ive helped so many friends with this phone and the same problem and its resolved with what i posted. No root access needed. Only unlock code required and its cheap enough. Did you get unlock code for your phone? because you cant do what I posted (see picture link in my post) with out unlocking first. Please post exactly what changes you made because i dont think there is a root solution for the G2x/android 2.3.3. Post exactly what you did in the app you installed. thanks
Click to expand...
Click to collapse
No root solution? Look at my signature.

exactly my point.
Sent using XDA App

pcdocta said:
exactly my point.
Sent using XDA App
Click to expand...
Click to collapse
What is your point? The root solution is linked in my signature. GB stock is easily rootable.

blink6966 said:
I've installed the zip and have followed the instructions over and over again, but somehow it keeps dropping out. i just upgraded to GB today (should have stayed with FY). the apn just keeps resetting to TMO over and over, my phone is completely screwed on data now thanks to GB. either way, anything you think i can do about the anp issue?
it just keeps failing or saying the connection timed out.
Click to expand...
Click to collapse
I have discovered this is a framework issue also. I can make you a new framework and build.prop that should fix this issue once and for all. What rom are you using? I need your framework-res.apk file and your build.prop. I can fix them and make a flashable zip for you to install.

[HOW-TO]Prepare your phone to send into Samsung/AT&T

This Guide is for any user that has a Rom installed. This will back-up almost everything the user has put on the phone.
So, here are some things you need.
Heimdall One Click KB2 - http://forum.xda-developers.com/showthread.php?t=1266172 (thanks to AdamOutler)
1) First, make a nandroid backup.
2) Make an /efs backup (adb pull /efs) (also can use an app called nitrality available in market)
3) Now, you will need to Plug in your phone to the computer. Take ALL the folders on your SD card and copy them to your laptop. (Mine was user/android/sdcardbackup)
4) Remove Micro-sd card, and SIM card
5) Open up your dialer and dial this code *2767*3855# THIS WILL WIPE YOUR SD CARD and /DATA
6) Reboot the Phone
7) put your Phone in download mode, open heimdall One Click and insert the phone and make sure that heimdall recognizes it
8) Flash the new firmware Bootloaders not required
9) Have the Phone Boot up Completely (takes a long time)
10) Check to see if your /efs has been edited. Use this thread http://forum.xda-developers.com/showthread.php?t=881162 (and your efs backup) to get it back.
11) You might want to dial *2767*3855# Just in case if there is anything left.
12) You should be running KB2, have your SD cleared, and ready to be turned into samsung.
Post Questions and comments below!

i decided to save this one, no clue why, just wanted to feel important...

Better include this or your phone might come back with a voided warranty.
http://forum.xda-developers.com/showthread.php?t=881162

bigbooty said:
Better include this or your phone might come back with a voided warranty.
http://forum.xda-developers.com/showthread.php?t=881162
Click to expand...
Click to collapse
It isnt supposed to erase the /efs but ill include it, thanks!

sepherian said:
It isnt supposed to erase the /efs but ill include it, thanks!
Click to expand...
Click to collapse
No. Flashing different roms jacks with your efs. A while back I decided to clean up my phone. Internal storage was a cluster. Just for the hell of it I decided to odin back to stock and master clear, then try the 2.2 kies update. Never had tried it. Well got the unregistered device thing and kies wouldn't update it. Found the thread above and downloaded hex editor and followed the instructions, edited my NV_DATA.BIN and reloaded stock jf6 and this time kies upgraded with no problems.
Flashing many different roms changes your product code even though SG tools said I had a sgh-I897, NV_DATA.BIN said I had something else.

When my cappy messed up, my imei got corrupted. Luckily I messed with around with sgs unlock a few months before and still had my back up and was able to restore it before turning it in. first thing I did with new cappy was back up efs. Product code was different also. Flash enough roms and it can mess up something as someone might be a novice coder and mess your device up.
Sent from my SAMSUNG-SGH-I897 using XDA App
Edit: fixed Imei

Nucleartx said:
When my cappy messed up, my meid got corrupted. Luckily I messed with around with sgs unlock a few months before and still had my back up and was able to restore it before turning it in. first thing I did with new cappy was back up efs.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
meid? i think you mean imei?

bigbooty said:
No. Flashing different roms jacks with your efs. A while back I decided to clean up my phone. Internal storage was a cluster. Just for the hell of it I decided to odin back to stock and master clear, then try the 2.2 kies update. Never had tried it. Well got the unregistered device thing and kies wouldn't update it. Found the thread above and downloaded hex editor and followed the instructions, edited my NV_DATA.BIN and reloaded stock jf6 and this time kies upgraded with no problems.
Flashing many different roms changes your product code even though SG tools said I had a sgh-I897, NV_DATA.BIN said I had something else.
Click to expand...
Click to collapse
Yes, I know. This Flash is not intended to mess with the /efs AT ALL, i have checked the package and it has no reference to /efs in the scripting. The post including the package also says this:
This package does not wipe:
EFS(Where your serial number and carrier information is stored)
Data(where your market apps are stored)
SDCard (where your pictures are stored)
Click to expand...
Click to collapse
So as you can see the number i have them call wipes the data and SD but they have their nandroid and SD backups. The number i have them call also doesnt touch the /efs. Trust me, I tested this method before i posted it and i didnt make an efs backup and my IMEI was perfectly fine afterward. I assume that nothing here messed with my /efs at all.
The only thing that would change the NVdata.bin would be an unlock tool. And i doubt that it even changes it.

OP was updated with more accurate steps.

Im looking for the best way to back up my IMEI

Any ideas post your
backup methods here

Look through the like 20 threads already posted about IMEI!! WAY TO MUCH INFO OUT THERE FOR A POST LIKE THIS!
Sent from my SCH-I535 using xda app-developers app

Look for Synergy_Backup_HWKeys_signed.zip load into SD card, run recovery, run ZIP...voila , backed up. If you lose it, find /synergy in recovery then the zip file to restore it

The synergy one seems to be the easiest. It was supposedly just confirmed to restore a lost IMEI, without the roaming issue too.

jaben2 said:
The synergy one seems to be the easiest. It was supposedly just confirmed to restore a lost IMEI, without the roaming issue too.
Click to expand...
Click to collapse
What are the real chances to lose an imei??? Does anyone know? 5%,1% or less? My guess is well less than .1% of phones//not flash attempts

mrpickem said:
What are the real chances to lose an imei??? Does anyone know? 5%,1% or less? My guess is well less than .1% of phones//not flash attempts
Click to expand...
Click to collapse
I don't know where you're getting your guesses from, but the important thing is that there is a chance. Better safe than sorry.

johnminator said:
Any ideas post your
backup methods here
Click to expand...
Click to collapse
might as well do the qpst method just to be safe as well. again, please use the search function.

Of course mine is backed up, but should I back it up again everytime there is a new tool/method?
My point is it must be very rare or there would be a much larger outcry on xda and the net in general.
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mrpickem said:
Of course mine is backed up, but should I back it up again everytime there is a new tool/method?
My point is it must be very rare or there would be a much larger outcry on xda and the net in general.
Click to expand...
Click to collapse
It's common enough that there are guides and methods about how to solve or counter the problem. XDA is a very small portion of S3 owners. Just depends on how safe you want to be. None of the current methods are guaranteed now even though all are confirmed to work to some extent. Maybe the new fix is all we'll need, but we thought that about QPST too. Time will tell.

I've been searching for several weeks on the best way to do this. The result was simply to be drowned by the deluge of information. Also, now that I'm already running CM10, there doesn't seem to be an easy way to do it. "Use the search" is not an acceptable answer in my case, nor the OP's and frankly, I'm tempted to report anyone who posts those words as spammers.

Download terminal emulator from the market. Type "su" (no quotations), then type "reboot nvbackup" (no quotations). Your phone should reboot and backup two modem files. If you lose your imei, open up terminal emulator again, type "su" (no quotations), then "reboot nvrestore" (no quotations).
Sent from my SCH-I535 using xda app-developers app

Deliquified said:
Download terminal emulator from the market. Type "su" (no quotations), then type "reboot nvbackup" (no quotations). Your phone should reboot and backup two modem files. If you lose your imei, open up terminal emulator again, type "su" (no quotations), then "reboot nvrestore" (no quotations).
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Doesn't get any easier than that!
The way I understood it was that there was a path in the reboot code that tried to restore imei from a backup. If "reboot nvbackup" was never run, then the imei would be restored from nothing. Once you run "reboot nvbackup", the backup will be there and you will no longer have an imei problem. Either way, this is great news!

Paul600k5 said:
I've been searching for several weeks on the best way to do this. The result was simply to be drowned by the deluge of information. Also, now that I'm already running CM10, there doesn't seem to be an easy way to do it. "Use the search" is not an acceptable answer in my case, nor the OP's and frankly, I'm tempted to report anyone who posts those words as spammers.
Click to expand...
Click to collapse
Look we all know what opinions are like. Yes got it we all need help but sometimes you just have to do it. Why not do multiple ways of backing it up so your safe. Yes they should have used the search or ask it it one of the IMIE forms that already exist I'm not straying to flame but come on guy we should report the OP for making this thread and not keeping up with it not the people who reply!
Sent from my SCH-I535 using xda app-developers app

maxpowerSr said:
Doesn't get any easier than that!
The way I understood it was that there was a path in the reboot code that tried to restore imei from a backup. If "reboot nvbackup" was never run, then the imei would be restored from nothing. Once you run "reboot nvbackup", the backup will be there and you will no longer have an imei problem. Either way, this is great news!
Click to expand...
Click to collapse
This is correct, the way E explained it is once you run nvbackup then you never have to worry about it!
If anyone wants to read about it it's in about page 690 of the synergy ROM thread.
Sent from my SCH-I535 using xda app-developers app

GatorLCA said:
Look for Synergy_Backup_HWKeys_signed.zip load into SD card, run recovery, run ZIP...voila , backed up. If you lose it, find /synergy in recovery then the zip file to restore it
Click to expand...
Click to collapse
Syergy back up works for all roms??

Look in the developer forms some one just posted a tool for backing up your IMIE. Should get you what you want and make it simple at the same time. Hope this helps.
Sent from my SCH-I535 using xda app-developers app

(SOLVED) Help Restore Lost IMEI & Serial No (SM-G920FD)

Hi, can someone guide me as to how I can restore my lost IMEI - Serial No back to stock? using SM-G920FD (duos)
Kindly refer below to the details of my problem and actions done.
How the issue happened
1. I'm currently on stock firmware of SM-G920FD (COH8). (Local copy of COH8 flashed via ODIN)
2. I received an OTA update (COI9) and installed it. Phone works perfectly fine.
3. After doing some tests on some kernel (arters97's kernels), I have decided to revert back to stock firmware since the kernel uses Note 5 gpu driver (not knowing that someone has prepared a flashable zip for S6 flat/edge) :crying:
4. I use my local copy of COH8 and flashed via ODIN. The flash failed thru sboot.bin - that tells me the bootloader is outdated on my phone *ugh.
5. I downloaded COI9 firmware from samfirmware site and flashed it via odin.
6. It is now stucked at first samsung logo. After going to recovery it says cannot mount /efs
Fixes I made
1. I dont know much stuff with efs thingy, that's why I didn't do a backup for it.
2. First fix, (this is the worst step I ever made - that costs me into this big trouble) I installed a "something" application that requires me to format the efs partition. Well done to myself, the app successfully wipe it all without backing up efs .
3. Now the phone is stucked to samsung first logo. Period. Even Reflashing stock via odin failed. Realizing the efs files are all messed up.
4. Now, after searching thru forums, Ive come into this adb command by running this, .
/system/xbin/su
mke2fs /dev/block/sda3
mount -t ext4 /dev/block/sda3
After doing this, Ive been able boot into device, I have a working WIFI, a valid ip address.
a. no bluetooth address
b. no imei for both sim 1 and sim 2
c. Incorrect Serial Number
d. No network of course
After deep searching thru xda, Ive come across with nv_data.bin editing thru Hex Editor. It could probably return my IMEI and Serial No back to normal(i still have the imei no & serial at the back of my phone ).
Perhaps, the only way to fix this will be on a repair shop to fix my imei. I doubt my samsung warranty would help since Im constantly flashing stuffs on my phone.
Can someone share me their full EFS folder zipped with Galaxy S6 SM-G920FD / G920F (probably a single sim will do) so I could compare and edit my own imei that would be a great help and I'll give a feedback asap.
Hoping someone can help me on this. Thank you

Anyone?
37 views of galaxy s6 owner and no one dares to share their efs

There is loads of information on the forums to recover lost IMEI. Did you try flashing a modem and bootloader update. This should generate the efs folder with nv_data.bin. You still may not have the correct IMEI and serial in the nv_data.bin, but at least you can edit it.
Search the forums I have seen loads and loads of tutorials for this problem.
Not many people are quick to give out there IMEI.

bahmonkeys said:
There is loads of information on the forums to recover lost IMEI. Did you try flashing a modem and bootloader update. This should generate the efs folder with nv_data.bin. You still may not have the correct IMEI and serial in the nv_data.bin, but at least you can edit it.
Search the forums I have seen loads and loads of tutorials for this problem.
Not many people are quick to give out there IMEI.
Click to expand...
Click to collapse
No, modem and bootloader flashing does nothing.
I do already have a pre-generated-stock nv_data.bin from my efs folder.
Can you give me an example of a working thread that requires editing of nv_data via editor that works?
The problem is that their issue has worked specifically on their device, none of the Galaxy S6 users were able to do that afaik. Almost a week since i started searching for answers but to no avail.
For example this, the thread below says that I should goto this address [offset] 00188008 but in my Galaxy S6 nv_data.bin, the file is only up to 000FFFF0 offset?? That's why I need help from others to at least share their fixes or comparison of this thread below with their nv_data.bin file. If there is similarity. Forget sharing your imei to me, but maybe you can consider how am I supposed to do that fix on the other thread.
Thanks
http://forum.xda-developers.com/showthread.php?t=881162

Or if someone can find their IMEI code in nv_data.bin, kindly share to me the offset (location) of the IMEI in hex editor. That would be a good start. Thanks

batuzai04123 said:
No, modem and bootloader flashing does nothing.
I do already have a pre-generated-stock nv_data.bin from my efs folder.
Can you give me an example of a working thread that requires editing of nv_data via editor that works?
The problem is that their issue has worked specifically on their device, none of the Galaxy S6 users were able to do that afaik. Almost a week since i started searching for answers but to no avail.
For example this, the thread below says that I should goto this address [offset] 00188008 but in my Galaxy S6 nv_data.bin, the file is only up to 000FFFF0 offset?? That's why I need help from others to at least share their fixes or comparison of this thread below with their nv_data.bin file. If there is similarity. Forget sharing your imei to me, but maybe you can consider how am I supposed to do that fix on the other thread.
Thanks
http://forum.xda-developers.com/showthread.php?t=881162
Click to expand...
Click to collapse
I can't remember exactly the offset location but I have seen it on my phone a few weeks back. I do remember seeing a few tutorials on YouTube. I will take a look tomorrow and if you haven't it solved by then I will help you fix it....

Thanks, hoping you could help me on that.
Something is weird on how efs is generated. I backed up the messed up nv data from efs folder. Then I deleted the contents of whole efs folder then reboot.
When phone booted, to my surprise I notice that it still generated the contents of efs. Then I compared the Newly generated nv_data to my backedup nv_data. No difference -_-. Still incorrect imei was given to me. 350000000000006 format both for sim 1 and sim 2.
Phone Info app says that my imei info (www.imei.info) was from an apple device rofl.
Since its giving me same and same imei and no product code/serial code
I suspect that my IMEI was generated from embedded hardware/chip??? But i think its not possible to mess any of the hardwareparts from flashing custom roms/zips/stock firmwares alone?

Hmm I think there's no chance for it to recover? since it is always giving me Generic Imei
One user says that it could be the hardware is somewhat corrupted or cant be modified blah blah
http://forum.xda-developers.com/showpost.php?p=30292696&postcount=185

Forget the EFS
Forget the NV
〔You should try to write cert〕!!!!!!!
Only in this way your phone will be working properly
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---------- Post added at 12:41 PM ---------- Previous post was at 12:39 PM ----------
batuzai04123 said:
Anyone?
37 views of galaxy s6 owner and no one dares to share their efs
Click to expand...
Click to collapse
This is my modified IMEI case success

china chenli said:
Forget the EFS
Forget the NV
〔You should try to write cert〕!!!!!!!
Only in this way your phone will be working properly
---------- Post added at 12:41 PM ---------- Previous post was at 12:39 PM ----------
This is my modified IMEI case success
Click to expand...
Click to collapse
You showed your edited IMEI on your phone, but you didn't share how ?
I think this is what Im looking for, but HOW???
1. What is that cert file? Can it be installed via phones system files?
2. Does it need third party app and a toolbox hardware to buy and install? It smells like its for technician part already :|
3. Since it needs key cert, how can I generate this? Thru the 3rd party also?
But FYI, Im not into modifying IMEI as it illegal, what I wanted to do is to restore my device's IMEI found at the back of my phone.

batuzai04123 said:
I think this is what Im looking for, but HOW???
1. What is that cert file? Can it be found via phones system files?
2. Does it need third party app and a toolbox hardware?
3. Since it needs key cert, how can I generate this? Thru the 3rd party also?
But FYI, Im not into modifying IMEI as it illegal, what I wanted to do is to restore my device's IMEI found at the back of my phone.
Click to expand...
Click to collapse
You have now lost the IMEI
If you still have flash the firmware is invalid
I think no way to restore the original IMEI
If change IMEI is illegal in your country, it would be a sad thing

ugh. Based from your pictures, you used 3rd party hardware tool and app something like octopus box and the likes.
You're telling me to give this to technician, as it is the only way to fix my issue?

china chenli said:
You have now lost the IMEI
If you still have flash the firmware is invalid
I think no way to restore the original IMEI
If change IMEI is illegal in your country, it would be a sad thing
Click to expand...
Click to collapse
Perhaps were not on the same page
What I wanted to do is to change my IMEI to stock IMEI (printed on my phone) so that it can connect legally to my network provider. If your way is good, maybe you can help me how to change my IMEI
Changing IMEI i.e., frying someones IMEI to hacked/stolen/blocklisted phones are definitely illegal.
Back to my issue, did you send your phone to technician/ did you have the box tool to flash cert files to your phone?
Hope you can help me thanks

batuzai04123 said:
ugh. Based from your pictures, you used 3rd party hardware tool and app something like octopus box and the likes.
You're telling me to give this to technician, as it is the only way to fix my issue?
Click to expand...
Click to collapse
Yes the octopus can do it
------------------------------------------------------------------
My English really bad, I speak a little bit more simple
If you don't have a backup EFS and your mobile phone and lost IMEI.
The solution is to use the BOX to write a new IMEI so that you will get a new IMEI
You write a new IMEI may and other mobile phone to repeat After doing this You will forfeit the warranty In addition to Will not affect the normal use of your phone
Samsung CERT is unique And only CERT must be the truth

china chenli said:
Yes the octopus can do it
------------------------------------------------------------------
My English really bad, I speak a little bit more simple
If you don't have a backup EFS and your mobile phone and lost IMEI.
The solution is to use the BOX to write a new IMEI so that you will get a new IMEI
You write a new IMEI may and other mobile phone to repeat After doing this You will forfeit the warranty In addition to Will not affect the normal use of your phone
Samsung CERT is unique And only CERT must be the truth
Click to expand...
Click to collapse
I get it. But this cant be done without using the box tools? Am I right?

batuzai04123 said:
I get it. But this cant be done without using the box tools? Am I right?
Click to expand...
Click to collapse
Yes, you need a BOX and a clean CERT

Well still thank you for the replies, only repair via technician is the only way . Requesting for mod to close the thread. No way the imei can be reverted back via EFS - NV way, flashing stock modem, backing and restoring efs, mke2fs thingy, flashing stock firmware and so on.
There is part on the chip of the phone that literally erases the phone info for my s6.
If any can give other ways before I let go HAHAHA, but please refrain from efs,nv_data,flashing stock stuff, as the firmware doesn't have to do with restoring efs. Only the hardware device stores efs info for our phone.

batuzai04123 said:
Well still thank you for the replies, only repair via technician is the only way . Requesting for mod to close the thread. No way the imei can be reverted back via EFS - NV way, flashing stock modem, backing and restoring efs, mke2fs thingy, flashing stock firmware and so on.
There is part on the chip of the phone that literally erases the phone info for my s6.
If any can give other ways before I let go HAHAHA, but please refrain from efs,nv_data,flashing stuffs, as the firmware doesn't have to do with restoring efs. Only the hardware device stores efs info for our phone.
Click to expand...
Click to collapse
If your phone is KNOX 0 x0
Then you can look for samsung to solve for you
I wish you good luck, my friend

Thanks , haha but my knox is 0x1 already

Tried to bring it to a legit 3rd party technician and they assigned a new IMEI for my phone and its working fine now.
imo I brought it first to Samsung and tells me that my warranty is void, but they can fix it via hardware replacement and would cost me at around $350. Lol no way!!!
For those who tried to do anything when all methods do not work, frustrations etc. This is the quickest way to restore it.
But thanks for the info I got from XDA members, now Ive learned that the first rule should be applied whenever possible before its too late.
To all other Explorers/newbies/Risk taker out there. Remember this one word.
BACKUP!!!!
Thanks.
To Mod:
Requesting for mod to close this thread thank you