This thing is found in all mobile devices which have an IMEI International Mobile Equipment Identity number assigned to it but the location and directory where it is stored might differ. On Samsung Galaxy devices, the IMEI and other connectivity data are stored in this particular folder that I have been mentioned several times so far. Having read about the role of EFS on your Samsung Galaxy phone or tablet device, you must be a little more curious to know something more about it.
In case the EFS directory is corrupted or lost, your phone or tablet is sure to lose its IMEI number and wireless and network connectivity. You might ask how and why does the EFS data on your device might be lost or get corrupted?
The answer is pretty simple and the reason might be a daring activity on your part. Sometimes flashing a custom Kernel as reported by some users and in most cases installing a custom ROM is responsible for the EFS data loss. Keeping this thing in mind most of our ROM developers insert a script that automatically creates a backup of the EFS data on the external SD Card so that you might restore it back in case of loss or corruption.
But it is certainly not wise to rely blindly on the wisdom of others. That is why, whenever we write installation tutorials for custom ROMs for Galaxy device, we warn users to backup EFS before indulging in any custom development activity. Once lost without being backed up, recovering it becomes very much like a wild goose chase. You might have heard or faced personally the issue when your device shows the inability to mount EFS:.
Of course, there are ways to restore EFS data, but they are either not available for all devices online or they do not work at all.
For more enlightening tips, do not forget to read the following article:. As the very title of this article says, we are going to tell about a very easy solution to back up the EFS on your Samsung Galaxy device.
It is a simple but wonderful tool developed by XDA member LiquidPerfection that makes this job a plaything that can be done by anybody. So, do you think you are ready for action now?
Make sure you have made all preparations detailed above. Having backed up your EFS data, you might take a calm breath and feel a sense of security but it is also important to be familiar with the method how you can restore it back to your Samsung Galaxy device in case you lose it. It is a free app and called kTool. Since it is a phone-based utility, it is easier to use. You might be already familiar with Aroma. It is a custom recovery based installer that can install custom mods, ROMs and scripts.
The users who own a Samsung Galaxy device with root access but no custom recovery can use a free app called Terminal Emulator to backup and restore EFS on their device. Here is how it can be done:. In case the terminal Emulator method using the above commands does not work for you, it might be due to the location of EFS partition on your phone. To fix that, you can try this:. I do not think you need a guide to do that. The option is found under Backup head.
When required, you can restore the EFS using the same tool. We tested the tool on Samsung Galaxy S4 and Note 3 and it worked fine. Besides, Samsung Tool also works as a reboot manager app. It lets you reboot your Samsung device into Download and Recovery modes without pressing the hardware keys.
Apart from the tools discussed in this article, you can find many others that work with specific device models. You can try them too! With a hope that it proves helpful to the community, allow me to wind up here. If you have question or problem related to the topic, feel free to leave a comment below. I just want my phone functional again. Thanks in advance for whatever help you can provide. Contact me directly if you need to, thanks again.. Good Day! I wish to thank you for this post.
I followed your instructions then got an emergency calls only error on my device. After a lot of digging I decided to restore my EFS. Mind you there was a number in the IMIE number but it was not the same. Restoring it solved the problem ….. Thank You! Hiii I Need help if I flash a cyanogenmod ROM cm11 will my efs will lost can I make call with cm11 or I have to restore it in cm 11 plz plz plz help me.
We recommend a backup as precaution. Just back it up and save it to the external storage and PC both for future use if you lose it. Hi Rakesh, Not sure if this issue has been disccussed before, but I cannot find it; if so, sorry. Please help in this regards , My phone is made in Veitnam Black Gold. And the log states that is has backed up to PC, but not the SD card is says could not find.
Nothing goes smoothly. No walkthrough works, always ommissions. There is any solution for LG G2 D i do not have any mobile network or signal? Can help anyone? Reinstall the drivers. Can You actually do that? From the above methods I found using the Aroma Installer easy. But after rebooting I cant find any efs file in the File manager.
So after watching some videos typed su and pressed enter. Then a popup came whether to Grant Superuser access to emulator, I pressed Yes. I typed the above code and it said cannot read file no such file. Then I opened file manager, I found the file efs. Did I do anything wrong? Also what is the difference between sdcard and External sd?
It ran on stock rom 4. I updaded online by kies, then I rooted successfully. However, after 2 days, my phone crashed suddenly. Now my phone is locked, even that it does not receive sim card. DroidViews:disqus i m installing the cm I have a windows 8. Also, does it support my Galaxy Nexus. Hi, I use SGS4. So after upgrating firmware I lost EFS data and any mobile connection. What does it mean? I need your help. Simply find a friend on similar network e.
My phone doesnt pass the bootloader. Martview Store. Log in Register. Search Everywhere Threads This forum This thread. Search titles only. Everywhere Threads This forum This thread. New posts. Search forums. Install the app. Thread starter Rudy Bintoro Start date Mar 15, Will flashing stock trip the Knox flags? Apr 25, at AM. Apr 26, at PM. Apr 13, at AM. Apr 29, at AM. Apr 7, at PM. Do things carefully. Muchas gracias por su respuesta If I install only the firmware work or have to add all components to the partition?
Apr 8, at PM. Apr 8, at AM. Apr 3, at PM. Hi, sorry for the super late reply. I some how missed your comment. Do you still need help? Mar 14, at PM. Mar 6, at PM. Did you create a nandroid backup before installing the Note 4 ROM? Mar 7, at PM. Thanks so much, this saved me!!!! Dec 24, at AM. Dec 14, at PM. I finish and pass those step.
But I still cannot install ROM from recovery. Dec 15, at PM. What issues are you having? Dec 15, at AM. Oct 4, at PM. Glad to know! Sep 29, at PM. Sep 17, at PM. Jul 9, at AM. Sep 11, at AM. You cannot go back to MJ5 when on KK. Jul 4, at PM. Jul 4, at AM. Jun 29, at PM. Jun 30, at PM. What was the firmware version of your device? Then find and equal or greater version of firmware to install it successfully. Jul 10, at AM. Jul 10, at PM. Jul 12, at PM. Jul 12, at AM. Jun 29, at AM. May 27, at AM.
May 22, at AM. Great now my bootloader is broke, thanks. May 17, at PM. Jun 7, at PM. Jun 7, at AM. Will it work like that, by flashing a 4. Apr 15, at PM. Apr 4, at PM. Mar 29, at PM. Will this work if I did the the leaked 4.
I wanna go back to 4. Do not flash the bootloader and you should be able to do it. Plzz help me. How can I recover it , plese help step by step. JJEgan Senior Member.
Oct 24, 30, 5, Feb 4, at P. Please wait Phone found. Announced Sep Features 5. Turn on the Samsung Galaxy smartphone. Samsung galaxy note 3 sm nl Android smartphone. Announced , September. Before downloading, make sure your device is Samsung Galaxy Note 3 SM-N, if it is not, then flashing the below stock firmware can brick your device.
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