i forgot backup my EFS Partition,then my phone lose baseband and showing unkown, who can backup a att g2 d800 EFS Partition for me ? thank you !
Now one. EFS is unique to your phone.
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My Samsung s4 us Cellular IMEI Number and Baseband Unknown
what can i do???
:crying:
What did you do?
Did you try factory reset? I suppose you have no efs backup...
Sent from my GT-I9505 using xda app-developers app
If you've not got an EFS backup available... try restoring back to stock firmware. People have reported that after restoring stock, their IMEI and the sorts have returned.
If you DO have an EFS backup, restore it and all should be ok
Which tool can I use to backup efs D802 v4.4.2 guys?
http://forum.xda-developers.com/gal...ol-updated-08-12-13-efs-professional-t1308546
Is the efs swappable between devices? Say my friend back ups his efs. can i then restore his backup if we both have the vs980?
No, efs is unique to each device.
Guys i need a help here i flashed official rom for s4 i9500 , and i did efs backup ,,
after finishing flashing i cant get any signal and null/null IMEI .. now how to restore efs folder ??
anyone can help
My guess is your were on lollipop and flashed kitkat.
Flash a lollipop modem and your imei is back.
New Life said:
Guys i need a help here i flashed official rom for s4 i9500 , and i did efs backup ,,
after finishing flashing i cant get any signal and null/null IMEI .. now how to restore efs folder ??
anyone can help
Click to expand...
Click to collapse
If you did a backup then you should be able to restore that backup using the same method. Eg: If you used an app, that app should be able to restore the efs folder.
The problem with the EFS folder on the latest versions of Android is that it doesn't contain the IMEI, last time I checked. The IMEI is now stored in hidden partitions, which is why when it comes to backing up this important stuff I recommend Wanam's EFS Backup tool from the Play Store. Not only does it back up the EFS folder, but also backs up those hidden partitions as well as the modem..
In this instance however, Lennyz1988 I believe has the right answer.
I updated my SM-G900A to the latest Marshmallow 6.0.1 using ODIN. Afterwards I can't make calls and I have no bars on the top. I may have chosen the wrong settings in ODIN 3.12.3. If my EFS data has been lost can I restore from the EFS partition? I don't think I chose the EFS clear option. I unable to root on this phone right? I am new to smartphones so I'm not sure what to do. Are there methods of restoring the EFS data from the EFS partition if it is still there without rooting the phone? I do have firmware for Lollipop 5.1.1 if that helps.
you cannot recover efs without a backup previous made
remosam said:
you cannot recover efs without a backup previous made
Click to expand...
Click to collapse
So if I used the default settings on ODIN and upgraded to Marshmallow the EFS partition would not be there anymore? What if the EFS data gets corrupted. Is there is no way to restore? I'm just assuming it is the EFS data and not something else. I read the EFS partition cannot be accessed without rooting the phone?