Deleted my efs and bluetooth folder, lost imei - Samsung Galaxy S9 Questions & Answers

i accidentally deleted my efs folder and Bluetooth folder using total commander.
i have reflashed my firmware using Odin
device is a Samsung s9,
If i boot to stock it crashes and says problem with Bluetooth,
i can boot into lineage and it says my imei is 0000000000

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I have tried reinstalling firmware twice the second time using a pit file / nand erase repartition,
What am I missing here ?

EFS partition is a special partition dedicated for your phone's info like radio signal info, IMEI, SN and lots of files revolving around your SIM card and Wi-Fi, Bluetooth ( this includes your MAC address for all the radios of your phone ). Imagine the EFS as a big folder containing all of the important stuff that makes the "phone" part of your phone.
EFS partition isn't part of any Stock ROM or Custom ROM.

xXx yYy said:
EFS partition is a special partition dedicated for your phone's info like radio signal info, IMEI, SN and lots of files revolving around your SIM card and Wi-Fi, Bluetooth ( this includes your MAC address for all the radios of your phone ). Imagine the EFS as a big folder containing all of the important stuff that makes the "phone" part of your phone.
EFS partition isn't part of any Stock ROM or Custom ROM.
Click to expand...
Click to collapse
How can I restore my imei ?

Syntaxerror_s said:
How can I restore my imei ?
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Click to collapse
My Bluetooth , and WiFi still work. Baseband displays. No eid or imei tho

Related

[Q] Possible Corrupted EFS File?

Hello folks. So yesterday I was tinkering around with my phone in an attempt to load the jelly bean ROM. I am new to the world of ROM's and things, so I made sure I did my research before going into the new ROM. I got everything backed up (so I thought), and flashed the jelly bean ROM. The screen just sat there doing nothing until I got rid of it and restored my backup from CWM.
Now every time I boot, I get a screen that says "Unfortunately, Factory Test has stopped" and it cancels out wifi and I have no lock screen/power off menu. I found a solution on XDA that said to look in the EFS file for a certain folder, but when I went into my /efs folder, this is what I saw.
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So there is nothing in my EFS file unless I'm reading this wrong. And I was stupid enough to save my original absolutely clean version from EFS Pro on the internal memory which I wiped. I have another backup which I think might also be corrupted on my computer from the Galaxy s3 toolkit.
The strange thing is that from what I've read, EFS corruption leads to the phone being useless with no functionality. Mine is almost totally functional, minus the Factory Test coming up.
Help please?!!
Bump. Any help would be GREATLY appreciated. Any ideas to shoot around at all.
bump. Im having the same issue
psychojv said:
bump. Im having the same issue
Click to expand...
Click to collapse
If your /efs folder is missing/empty try this:
Get back to stock
Open Dialer
type ##72786#
Follow prompts

[TOOL] IMEI Backup Restore (without PC)

The tool is created to backup restore IMEI from phone itself (Recovery)..
Why should i backup?? -
This Tool takes backup of below important partitions .
modemst1 ,modemst2, fsg, fsc, DDR ,bk1 ,modem
This part of the device contains some important and some basic info related to our device identity like Bluetooth address, wireless devices MAC addresses, and the very main IMEI address , programming parameters for the device such as your account information (phone number, etc), data provisioning parameters, and a whole bunch of other things.
which is very specific to your device and can't be easily generated.
So we can't take chance losing these data.
Requirments-
Any Custom Recovery (like TWRP,CWM etc..)
Process
Download the zip from Here http://d-h.st/rp2 or from Attachments .
Place it in your sdcard.
Goto recovery and flash it.
follow the instructions ...
Note-
The Backup files are stored in "MYIMEI_TOOL" folder of your Internal or SD card as you choose.
Credits -
This tool uses some scripts from Dr.ketan's EFS tool for Note ll
Sector1369 (Me)
This Tool is only for Redmi 1S
Screenshots-
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Sorry for the camera screenshots..
Recovery taking the screenshot after closing AROMA installer ,Also tried to pull directly from frambuffer but blured images ...
I've already backup my imei using terminal emulator. Can i restore my backup using this?
zacutesz said:
I've already backup my imei using terminal emulator. Can i restore my backup using this?
Click to expand...
Click to collapse
yaah just move ur files to MYIMEI_TOOL folder
or u can take new backup
its all GUI based..
its Easy...
Not working on redmi 1s when i flash via twrp restart phone no aroma start.

Lacking of mobile networking after unsuccessful a firmware rollback

Hey everyone. I've faced with a problem I can't cope by myself. Once upon a time I found out despite the renewal was turned off on my phone that my phone was updated to MIUI 11. I didn't like it so much. It had buggs, terrible design and devoured phones charge like a fish. I lost my nerve and made rollback. so, I lost everything that makes a phone different from a brick with lights. After that I decided to read about ) but It was too late. So, I lost all of system settings due to antirollback policies. What about backup? certainly I hadn't made it. I had one on google drive but It didn't give it to download.
I found some efs files and managed to recover system settings such as wifi, imei, modem, almost everything except the mobile network and the internet. the engineering menu shows the efs is unknown.
It means the efs I recovered my phone isn't suitable for my phone version or I need radio.img in addition to, doesn't it?
I'm going to try input SN number via a special utility into the phone. I don't expect anything from this step, but...
I suppose I need some with radio band settings or something from it. Or I need to find the new EFS files, don't I? I remember the file I'm restoring the phone was the ancient fossil of 2016.
how much does it cost to buy up-to-date EFS? Where could I find them? Where should I look for?
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Question OP9 proModemst 1 and 2. Modem a and b and modem dump question

So what is the point of backing up your modemst 1 and 2? I have partitions back up and restore and it showsfiles highlighted. Which one do I need for conversion? At what point will I need these partitions durning conversion. How do I use or flash them? I'm hesitant to proceed with conversion until I get a better understanding of how I should back them up and restore them.
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I think that I'm backing up them up just in case somethint goes wrong but I'm not 100%
Modem a for a partition, and modem b for b partition. These are the ones a TMobile device has to flash when going to a custom Rom/another Oxygen build. These can be shared, etc. The st1 and st2 is for your specific device and uses fastbootd, but these can not be shared and will result in a soft brick if I'm not mistaken. Modem a,b is the ones for conversion if on T-Mobile,etc.
jwidel said:
So what is the point of backing up your modemst 1 and 2? I have partitions back up and restore and it showsfiles highlighted. Which one do I need for conversion? At what point will I need these partitions durning conversion. How do I use or flash them? I'm hesitant to proceed with conversion until I get a better understanding of how I should back them up and restore them.View attachment 5405181
Click to expand...
Click to collapse
[TMO] 9 PRO MODEM RETENTION/DATA FIX
----- With the release of OOS13, the modem issue no longer exist. Thank you all for the support & help with this unfortunate issue, we had to endure.... ----- EXPLICITLY FOR TMOBILE 9 PRO (I'm not responsible for your failure to read or...
forum.xda-developers.com

Where to get a good persist.img file from?

Im once again into this typical "I bricked my phone and spend endless hours searching for tutorials and hoping that something work" stuff. This time I broke my persist.img and noticed something strange:
There are dozen of tutorials which state that one should download a clean fastboot rom to extract the persist.img (".\images\persist.img") from the image folder and flash it either using recovery or fastboot edl in combination with a modified rom to only flash this partition.
Now I noticed that the persist.img partition is pretty empty for most Xiaomi stock roms:
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In comparisation the persist partition I extracted from a friend who luckily got the same phone:
How is the above persist partition from the stockrom supposed to help someone when there are just empty files? Atleast for me it didnt bring back the sensors when I flashed it. On the contrary the persist partition from my friend fixed everything.
If the persist file of every stock rom is empty beside a few zero byte files the conclusion would be that the only way to get a working file is to get your hands on a unmodified one from someone else.
Or is there some magic that will enrich the partition with new files as soon as you boot the stockrom for the first time?
How come there are so many tutorials saying that one should flash this partition from stock?
are you sure you have downloaded a fastboot (TGZ) rom and open the TAR file?
Package Name: grus_eea_global_images_V12.5.1.0.RFBEUXM_20210526.0000.00_11.0_eea_0f94ab4db4.tgz

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