Google Fi Wireless

Google Fi assigns you a real US phone number and handles calls, texts, and data across 200-plus countries automatically. If you're based in the US or need a US number abroad, it's one of the simplest options because everything syncs through your Google account.

The integration with Android devices is especially tight, though it works on iPhones too. It appeals to US travelers who want minimal setup and don't want to think about different eSIM providers in each country.