How to backup and restore "EFS" folder on Android?

It is essential to know how to make a backup copy of the "EFS" folder of Android , if you are one of the users who " flash » constantly la ROM.

Therefore, it is also important to know the differences between RAM and ROM to do a good job with better understanding.

This is basically to avoid fatal errors if some of these processes fail, providing assurance. Especially if the person who is going to perform the procedure is doing it for the first time, which makes it more likely that something could happen.

Il is therefore always advised to make a backup of this essential file , which will ensure the security of the computer.

What is Android's “EFS” folder and what is it for?

This folder has an essential function in the mobile phone, because it has stored some vitally important data for the computer.

These include SIM data, as well as IMEI number, Bluetooth information and MAC number, as well as other essential information.

In addition, it records the " productCode Or, rather, the product code, and the UNLOCK SIM is also found.

All these files in the folder are essential items which when deleted by accident can cause irreparable damage.

And this why? Well, this is the main goal when trying to free cell phone or change Android version or install a ROM.

This is where the importance of generating a backup of the folder lies, in this way it is guaranteed that said unrecoverable and unique data will be safe.

And if something goes wrong during the process and Android's “EFS” folder is damaged, you can reset your computer without problem .

If he did not have it, there would be no way to fix the cell phone, causing an irreversible condition, preventing it from performing its functions normally.

Make a backup copy of the "EFS" folder

Keep in mind that in order to perform this procedure you must have some experience and knowledge in the field or subject.

That said, that poses a risk if not done correctly , so if you don't have the skills for the task, you better not.

So, you can also find someone you trust who also has experience to help the owner of the equipment with the backup.

Now if you decide to start, what you need to do to continue is enter the root directory ( / ) from the phone, where the folder is located

For this you may need " rooter ", This way all user permissions will be granted to the owner of the phone. Also, a file manager should be obtained which has the capability to explore the root files of the device in question.

From there, and being in the mentioned location, the Android “EFS” folder ( /efs ) is placed, and your finger is pressed on it. This will show a series of options, what you will need to do is select the one that says " Copier To clone the contents of the files.

Then it should be pasted in a separate location other than the root folder. It can work if done in removable or SD memory.

Restore the EFS folder

If, on the other hand, you want to restore the EFS folder using a backup, you just have to do the process in reverse .

In other words, copy the security duplicate and, through a file manager with root permissions, put the EFS folder in the path » /efs «

Then the computer will restart in recovery mode or " Recovery mode ”, Where it will be sufficient to follow the following instructions or commands.

Choose in this order the options " Wipe data factory reset ", Then in" Wipe cache partition ", and finally " Advanced / Cache wipe dalvik ».

Once done, the terminal will restart and the EFS folder of the Android device in question will have been restored.