Simly

Simly competes primarily on price and transparency, charging $1 per gigabyte across 190+ countries with no hidden fees or subscription boxes. Every plan includes tethering so you can share your connection with a laptop or another phone. Activation is instant via the app, and you get 4G/5G access wherever it's available from local carriers, with no daily or hourly throttling.

Simly works best for data-conscious travelers who know roughly how much they'll use and want predictable costs. If you stream heavily or work remotely abroad, the $1/GB rate could exceed plans sold by the day, but for light to moderate use it's competitive. The appeal is simplicity: no monthly subscriptions, no complex tiering, just purchase what you need and go. Compare it against regional providers at your destination, since some countries have dirt-cheap local SIM cards if you're willing to set one up in person.