Is mobile data more reliable than the Wi-Fi in Antigua or at Lake Atitlán?

Yes. While cafes in Antigua have good Wi-Fi, it can be crowded and slow. In towns around Lake Atitlán (like San Pedro or Jaibalito), Wi-Fi is notoriously slow and unstable, especially during storms or power cuts. A Cellesim eSIM gives you a private, fast 4G connection and is a crucial backup for digital nomads or anyone needing a stable connection.