What is efs folder? - General Questions and Answers

I like to know what is efs folder?
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[email protected] said:
I like to know what is efs folder?
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EFS is a partition where all important data stored like IMEI, Mac addresses of wifi. If you messed up and currupted efs partition then your android no longer connect to mobile network or wireless network. So it is always advisable to backup efs partition before flashing roms to recover from this situations.

Ashwinrg said:
EFS is a partition where all important data stored like IMEI, Mac addresses of wifi. If you messed up and currupted efs partition then your android no longer connect to mobile network or wireless network. So it is always advisable to backup efs partition before flashing roms to recover from this situations.
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My current rom is android 4.3 . Can I upgrade my device to kitkat? Is my efs support for kitkat?
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[email protected] said:
My current rom is android 4.3 . Can I upgrade my device to kitkat? Is my efs support for kitkat?
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If upgrade available for your android then you can upgrade. Your efs not get currupted. For safety reason backup your efs partition.

How to backup efs partition?
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Ashwinrg said:
If upgrade available for your android then you can upgrade. Your efs not get currupted. For safety reason backup your efs partition.
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How to backup efs partition?
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@-Hope- @Droidriven can you tell me how to backup efs partition and how to restore it again?
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[email protected] said:
@-Hope- @Droidriven can you tell me how to backup efs partition and how to restore it again?
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There's two methods that I know of for Qualcomm devices, also works on devices that have Exynos chipset but they have to have a Qualcomm radio/modem chip.
adb method
Terminal Emulator method
The adb method is the better method but the terminal emulator method works directly from the device without PC.
https://forum.xda-developers.com/showthread.php?t=1852255
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Related

(Q) Can you backup EFS without root

Hi all just a quick question can you backup EFS without root? I have es file explorer and can see EFS folder can I just copy and paste the folder? I'm fully stock.
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bassist9 said:
Hi all just a quick question can you backup EFS without root? I have es file explorer and can see EFS folder can I just copy and paste the folder? I'm fully stock.
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No, I don`t think you can.
You should be able to without root in recovery but will have to be unlocked. You can backup efs in twrp or flash the efs backup zip in recovery (twrp or cwm)
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How does one corrupt their /efs partition?

How does someone mess up their /efs partition?
Wouldn't you have to deliberately target this partition in some manner? I can only see a risk if someone were flashing a complete twrp backup that includes the /efs partition, but that's about it.
I backed up my /efs via twrp and uploaded it to a cloud storage provider. A few days later, I made a second /efs backup on my sdcard, however I would never think of regularly backing up this partition, as it should never need to be restored.
So yeah... my question is how would someone mess this partition up?
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_jordan_ said:
How does someone mess up their /efs partition?
Wouldn't you have to deliberately target this partition in some manner? I can only see a risk if someone were flashing a complete twrp backup that includes the /efs partition, but that's about it.
I backed up my /efs via twrp and uploaded it to a cloud storage provider. A few days later, I made a second /efs backup on my sdcard, however I would never think of regularly backing up this partition, as it should never need to be restored.
So yeah... my question is how would someone mess this partition up?
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in my 5.5 years of android ive never backed up my efs, ever. but, random stuff happens in life.
^ same here. Been an android superuser since day one.
Backed up the efs on this device, and also my galaxy nexus because twrp allowed me to... Just no idea how one corrupts the partition.
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_jordan_ said:
^ same here. Been an android superuser since day one.
Backed up the efs on this device, and also my galaxy nexus because twrp allowed me to... Just no idea how one corrupts the partition.
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it happens randomly on rare occasions.
_jordan_ said:
How does someone mess up their /efs partition?
Wouldn't you have to deliberately target this partition in some manner? I can only see a risk if someone were flashing a complete twrp backup that includes the /efs partition, but that's about it.
I backed up my /efs via twrp and uploaded it to a cloud storage provider. A few days later, I made a second /efs backup on my sdcard, however I would never think of regularly backing up this partition, as it should never need to be restored.
So yeah... my question is how would someone mess this partition up?
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You only have to backup EFS once , its not beeing updated
_jordan_ said:
How does someone mess up their /efs partition?
Wouldn't you have to deliberately target this partition in some manner? I can only see a risk if someone were flashing a complete twrp backup that includes the /efs partition, but that's about it.
I backed up my /efs via twrp and uploaded it to a cloud storage provider. A few days later, I made a second /efs backup on my sdcard, however I would never think of regularly backing up this partition, as it should never need to be restored.
So yeah... my question is how would someone mess this partition up?
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On this phone most symptoms that look like efs corruption aren't but always backup to be safe.
On a samsung, almost everything you do has a 5% risk of efs corruption including powering up the phone
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gee2012 said:
You only have to backup EFS once , its not beeing updated
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I wanted a local backup on my sdcard. Deleted the original for some reason.
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_jordan_ said:
I wanted a local backup on my sdcard. Deleted the original for some reason.
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If you're going to back it up. Don't leave it on your internal, copy it to a pc. If you ever do need it chances are that your internal is not going to be accessible.
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I just uploaded mine to my Google Drive. Never done it in the past but thought I'd do it this time to be safe!
EddyOS said:
I just uploaded mine to my Google Drive. Never done it in the past but thought I'd do it this time to be safe!
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I make a backup to internal SD card using 1 method. I copy that (leaving on internal memory too) to my NAS. I take a second backup with the same method and do the same again. I then repeat this using a second method

[help] cant backup on sd card

When I attempt to backup it says unable to stat backup path if anyone could help me I would appreciate it
Glitched Soul said:
When I attempt to backup it says unable to stat backup path if anyone could help me I would appreciate it
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Friend say clearly which backup whether nandroid or app backup. then only we can help you
Sakthivel_Subbiah said:
Friend say clearly which backup whether nandroid or app backup. then only we can help you
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nandroid i tried doing a nandroid backup.
If you are using cwm then you should have a folder named clockworkmod.. otherwise create a folder with that name on sdcard and try
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Is this app safe to save EFS ?

https://play.google.com/store/apps/details?id=ma.wanam.efs
Is this app ok or do I need to do something different to save the efs ?
I have the 920F .
It's recommended. Just make sure you copy the backup somewhere safe - I keep mine on a USB OTG stick, *and* 2 different cloud storage providers.
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DarryDoo said:
It's recommended. Just make sure you copy the backup somewhere safe - I keep mine on a USB OTG stick, *and* 2 different cloud storage providers.
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Also,how do I flash the .tar files from the backup ? I know I have to use odin,but where should I put the files?
You can select Restore in the app's menu, and it'll explain how to restore.
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Restore nandroid backups (data partition) between different flavor (cm, oos, stock, e

Is it possible to restore data partition from a nandroid backup when flashing different type of roms?
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aniel300 said:
Is it possible to restore data partition from a nandroid backup when flashing different type of roms?
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Thats not possible in the way you'd like to.
You can use a backup tool e.g. Titanium Backup to backup / restore apps
or
extract apps from a nandroid backup (needs "Pro")
Keep in mind that restoring apps to different android versions may potentially cause errors.
LS.xD said:
Thats not possible in the way you'd like to.
You can use a backup tool e.g. Titanium Backup to backup / restore apps
or
extract apps from a nandroid backup (needs "Pro")
Keep in mind that restoring apps to different android versions may potentially cause errors.
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Thank you for your reply is well appreciated
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