Legacly speaking there is no “serial pairing on device” apple have crafted this to infact be calibration profiles and then have put the job on apples servers to not let a phone download calibration info for part SN that have already been paired to another SOC.
This was a change with the iPhone 12 (and M1 Macs). Moving it server side means they could (and might well) change this to let you download the profile but only if the donwer device is not iCloud locked (otherwise it might be stolen…)
Should they provide documentation on how third parties can create thier own calibration profiles and provide them along side parts? Yes but getting a law past that would require apple to write stuff would be hard in the US… the entire “you can compel speech” legal defence that apple used successfully to not be forced to make a custom version of iOS that would let the FBI crack into phones.
Legacly speaking there is no “serial pairing on device” apple have crafted this to infact be calibration profiles and then have put the job on apples servers to not let a phone download calibration info for part SN that have already been paired to another SOC.
This was a change with the iPhone 12 (and M1 Macs). Moving it server side means they could (and might well) change this to let you download the profile but only if the donwer device is not iCloud locked (otherwise it might be stolen…)
Should they provide documentation on how third parties can create thier own calibration profiles and provide them along side parts? Yes but getting a law past that would require apple to write stuff would be hard in the US… the entire “you can compel speech” legal defence that apple used successfully to not be forced to make a custom version of iOS that would let the FBI crack into phones.