In general apk file EFS Backup Tool has rating is 7.6 from 10. This is cumulative rating, most best apps on google play store have rating 8 from 10. Total reviews in google play store 296. Total number of five star reviews received 163. This app has been rated like bad by 52 number of users. Estimated number of downloads range between 100,000 and 500,000 in google play store EFS Backup Tool located in category Tools, with tags backup and has been developed by Jwarriors. You can visit their website
https://plus.google.com/102478679614622194744 or send
mario.jwarriors@gmail.com to them. EFS Backup Tool can be installed on android devices with 2.3(Gingerbread)+. We provide only original apk files. If any of materials on this site violates your rights,
report us You could also download apk of Google and run it using android emulators such as big nox app player, bluestacks and koplayer. You could also download apk of EFS Backup Tool and run it on android emulators like bluestacks or koplayer. Versions of EFS Backup Tool apk available on our site: 1.0. Last version of EFS Backup Tool is 1.0 was uploaded 2017/03/07
With this application you will be able to back up the main configurations of your Samsung Galaxy in order to change the rom without any concern. Generally when you install a new rom to your android device there is no problem, but sometimes the configuration of your device, like imei and internet configurations are lost and your android device doesnt work properly, so just to be sure is common to make a back up of the EFS configurations.
Almost every Samsung Galaxy with a EFS configurations would be compatible, I use it in my Galaxy S3 with Revolution 12 rom without any trouble.
You have to give root access to the application in order to work, don't worry when you launch the application, it asks for the permissions.
Warning:
Although, I used it in my device without any problem, it could cause problems in yours, so use it at your own responsibility.
Don't use it in Galaxy Ace, this device show a lot of problem when you want to backup those configurations with any application.
I have used the method recommended in forums and internet tutorials. Read XDA forums for more information.