Staying Connected in Costa Maya, Mexico
The port in Costa Maya has free Wi-Fi throughout the terminal area. Local restaurants, resorts and the Malecon also offer free Wi-Fi to their customers.
Cellular service is available for all major carriers through local partners. You would have to add international service to your plan to avoid paying high rates (even with international plan the rates are relatively high). Verify cost with your service provider prior to departure. The best way to contact anyone is through Wi-Fi voice (VOIP), texting (iMessage or similar) or video (Facetime calls).