This method is a WORK IN PROGRESS and is NOT guaranteed to work on all devices! I am still in the process of developing a full cellular network fix and will release it when it is finished. This is just a progress update to demonstrate the full method that will likely be used in the future.
The files data_ark.plist and activation_records.plist need to be modified for a network fix so knowing their locations and how to transfer them from device to device is important to figure out.
Watch the full video below:
This method Credit to: Apple Tech 752