Yesim

Yesim operates as a mobile app, making it straightforward to browse and purchase data for the USA or any of 200-plus other countries. Top-ups happen directly through the app, and there's no lock-in contract, so you can walk away whenever you choose.

Suits travelers who want to avoid commitments and prefer app-based convenience. Pricing stays transparent with no hidden monthly obligations, and the pay-as-you-go structure means you only pay for what you actually use.