Is CheapESIM mobile data a more reliable choice than the Wi-Fi at my Santorini (Oia) hotel?

Yes, without a doubt. Wi-Fi in many charming 'cave' hotels and Airbnbs in popular areas like Oia (Santorini) or Mykonos Town can be notoriously slow, congested, and shared among many guests. A personal CheapESIM provides a dedicated, fast 4G/5G connection that works reliably in your room, by the pool, and crucially, as you explore the island. It's a private, consistent connection, offering far better value and performance than often-unreliable hotel Wi-Fi, ensuring you stay connected on your terms.