Short answer: Yes, technically, it can be done.
Long answer: The "work" is temporary, physically dangerous for the phone, and legally radioactive. nokia 1208 imei change work
Here is the current state of play for the Nokia 1208: Short answer: Yes, technically, it can be done
If you search for "Nokia 1208 IMEI change work," you will find links to Nokia Software Updater hacks or Nemesis Service Suite. Do not waste your time. These tools work for BB5 phones (Nokia 6300, N95). For the DCT4 Nokia 1208, these software-only methods do not work because they cannot bypass the RAP3G security. You will either get "Write Failed" or brick the phone. Do not waste your time
Most people searching "nokia 1208 imei change work" actually have a phone showing "IMEI: 123456789012340" (all zeros or a generic number) after a failed flash. This is not a "change" but a repair.