timrichards, I'm thinking, for a change, of not buying a local SIM (or eSIM) for my upcoming trip to Switzerland. It's only ten days, so if I use data sparingly and stick only to wifi on some days, I should be able to use my Australian number on Telstra's $10/day international roaming day pass, and not spend much more than a new SIM. Hmmm worth a try I think.