Which provider offers better speeds in places like Thailand or Vietnam?

Speed depends entirely on the local network partner. Cellesim partners with top-tier providers like AIS in Thailand and Viettel in Vietnam, which generally offer the fastest and most extensive 4G/5G coverage. With Airalo, the speed can vary because they are a marketplace; a cheaper plan might use a budget network with slower speeds, especially outside major cities. For consistent high performance, Cellesim has the edge.