I have read somewhere that the calibration data is more specific to the type of chip, of course there is some data like the MAC that is specific to the router. If this were true, the calibration data of an RT3062 chip would theoretically be interchangeable. It is just what I am trying to do with an HG622, I want to put the calibration data of a HG556a Ver.C, but the partition CAL_DATA is write protected and I could not. In the link that I gave to correct a HG556a, the firmware was modified to be able to write in that partition, but in the current firmwares it does not allow to overwrite that partition. Which does not make sense, because if a user makes the backup of the partition CAL_DATA, then it can not dump that information because it's write-protected. The latest version of the firmware that I tested, a snapshot version, generated the partition CAL_DATA without problems, which did not make version 18.06.1, but I could not dump the CAL_DATA information obtained from the HG556a, since the partition continues protected against writing. If someone can tell me how to write the calibration data in the CAL_DATA partition, skipping the write protection, I will report the results as soon as possible.