How does iPhone restore so fast? Yesterday, I restored my iPhone in DFU mode. I think iOS is built from source in this mode and there is no way to access old data. My backup size was around 3 GB. Even though my internet speed is fast. Downloading the backup took 1 minute but the actual installation of backup only took under 10 seconds.
I wonder how is backup restored so fast?
I would like to know how the installation of backup works for iOS.
There is no way 3 GB is transferred under 10 secs. It would need &gt;300 MB/s speed. Most probably your backup was already there.