Is roaming with my European SIM card free in Mayotte, or should I use EastESIM?

While Mayotte is a French overseas department, making it technically part of the EU 'Roam Like at Home' zone, relying solely on your European SIM can be tricky. Many EU carriers impose 'Fair Use Policies' that severely limit data in overseas territories, or they might throttle speeds significantly. This can lead to unexpected charges or a frustratingly slow connection. For reliable, transparent, and high-speed data across Grande-Terre and Petite-Terre, an EastESIM plan specifically for Mayotte is often the smarter and more stress-free choice.