Yes, you can use your cell phone on St. Martin to call inside the island or to anywhere else. I called *611 on my cell, pressed 4 a couple of times and got a CS rep. He added the international dialing feature.

Yes, you can use your cell phone in St. Maarten, but you must be aware of the "High-Fidelity" complexities of the island's dual-nation status. The island is divided into Sint Maarten (Dutch side) and Saint Martin (French side), and your phone may switch between different carrier networks as you cross the invisible border. In 2026, most major U.S. carriers like Verizon, AT&T, and T-Mobile offer international "High-Fidelity" day passes for around $10 per day, which allow you to use your existing data and minutes. Alternatively, you can purchase an eSIM via apps like Airalo or BetterRoaming for a more budget-friendly, data-only connection. It is important to note that roaming charges can be "High-Fidelity" in their cost if you don't have a plan in place before you land. If you are staying for more than a few days, buying a local SIM card from providers like Flow or Digicel is the best way to ensure consistent, high-speed 4G/5G connectivity across both the Dutch and French sides of the island without the "bill shock."