Claro and Altice are the main telecom names travelers will encounter. A local SIM is inexpensive if you carry an unlocked phone and your passport. Wi-Fi is widespread in hotels, cafes, restaurants, and many bus stations, but consistency drops outside resort cores and on more remote peninsulas or boat-heavy days. Download maps, airline QR codes, and operator meeting points before transfer days.

Spanish is the default language nationwide. English is common in major resorts, many dive centers, airport services, and organized excursion settings, but much less reliable in buses, roadside stops, and smaller local businesses. A few practical Spanish phrases make transfers and problem-solving much easier.

Carry travel insurance that explicitly covers scuba or other in-water adventure activities, medical care, and evacuation. If you will rent a car, review local liability and collision coverage carefully. Storm interruption and trip-delay protection are especially useful between June and November, when weather can force a route change even if your specific resort remains open.

Pack for heat, sun, and wet logistics rather than cold-water bulk. A rash guard or 3mm suit works for many travelers; a 5mm is better for repetitive diving, deeper wreck days, or anyone who cools quickly. Add a broad-spectrum reef-safe sunscreen, hat, polarized sunglasses, compact dry bag, hydration bottle, mosquito repellent, and basic boat meds. If you are diving multiple regions, an SMB and reliable computer matter more than extra clothing.