Yesim

Yesim founded in Switzerland and now serves over 200 destinations offers data packs you buy one at a time with no obligation to recurring service periods. The free trial plan lets you test the app and verify your phone works with their eSIM format before spending any money. You're charged only when you activate a pack, not locked into billing cycles.

The trial removes guesswork from trying a new provider, especially valuable for less common phones. Once confident, buying packs on demand suits unpredictable travel and short-notice trips. Yesim works best for people who travel irregularly and dislike subscription commitments.