Opera has integrated a built-in travel eSIM into its Android web browser, allowing international travelers to access cellular connectivity without expensive roaming fees. The company is offering a promotional trial that includes 3 GB of free mobile data for three days in 47 major destinations. This feature provides comprehensive cellular data access across the smartphone's operating system, enabling essential apps to function without physical SIM swapping. The activation process does not require credit card registration or personal email verification and can be completed within the app. The service is designed for American travelers as a cost-effective alternative to high international day passes from U.S. carriers. It operates in partnership with Holiday.com, offering additional paid data bundles of 3 GB, 5 GB, and 10 GB with 30-day validity at competitive prices. Users must have a carrier-unlocked smartphone running Android 10 or newer with eSIM support, and the service is exclusive to the standard Opera for Android client. It supports high-speed 5G networks where available and covers popular destinations in Europe, Asia-Pacific, and the Americas.