RMA tracking:
Jan 7: E-mail sent to Jolla Care through https://jolla.zendesk.com/hc/en-us/requests/new
Jan 8: Jolla response: I must send my handset to Finland for repair. They ask me for personal data.

Meanwhile, I try to find another phone for daily use.

Jan 19: Data sent to Jolla. They give me a PDF "air way bill" which I must print out and attach to the package.
Jan 20: Package delivered at my FedEx nearest office.
Jan 26: My Jolla is "back" in Finland.
Jan 27: Jolla Care gives me a link, http://www.kirjaahuolto.fi/huollontila/haku.php , to track the progress of the repair.
Feb 2: "Tracking link" says mainboard has been changed.
Feb 3: Jolla packaged and returning Spain, delivery scheduled at Feb 10.