NRF9161 IMEI obtaining / generation how to

Greetings,

We switched from nrf9160 to nrf9161 and got the first boards manufactured. NRF9160 has been working fine but we wanted improved GNSS functionality on board.

Now we are facing a surprising problem we were not expecting. nrf9160 seems to come with a pre-assigned IMEI on the modem, however, on nrf9161 that's not the case.

There was good documentation on how to write IMEI to the device but I could not find good documentation on generating the IMEI or where to obtain one. I assume I can't just freestyle it?

I would like to know how to properly obtain or generate IMEI number for my device as a manufacturer and if any hints if there are any legal responsibilities assigning my own IMEI.

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