I have enabled VoWifi trough changing the Qualcom Profiles with PDC Tool. Now on every Update i need to reenable it, by changing the Profiles again.
This change is part of the EFS Partition. Is it fine to Backup the EFS Partition before the Update and restore the Backup after Updating the Rom. General it works, i have already tested, but because i'm not sure of the exact function of EFS Partition, can there be any negative side effects on Restoring EFS Partiton of an older Rom Version?
Or can someone explain me in clear words, what exactly the EFS Partition stands for and what is the content of this partition.