I've been using nostr:npub1vr2nva0s0hhfulthjy8053rg9kruk5erzwaxdw85gjwkfytj994sgudzvx for a couple of days.

Landed in Copenhague and it automatically connected to the cheapest provider. It was faster to connect than my Thai SIM. And the quality was acceptable. Good for calls. A bit slow for video calls.

Arrived in France, and similar experience.

I blocked Amethyst, and have used about 50 cents of data for calls.

TBH, great experience so far. Highly recommended for travelers.