Hotel Zone wifi is universally terrible - overloaded networks, constant disconnections. Every resort promises 'high-speed internet' but can't handle 3,000 guests streaming simultaneously.

Telcel SIM cards at airport arrivals (350 pesos for 10GB) work perfectly throughout Quintana Roo. Coverage reaches Tulum, Playa del Carmen, even cenotes near Valladolid. Way more reliable than any hotel system.

Skip pocket wifi rentals - batteries die in 35°C heat, expensive at 200 pesos daily. Local SIM much better value.

Restaurants have wifi but always ask for password - usually business name or 'cancun123'. Starbucks at La Isla has fastest speeds for video calls.

Download Google Maps offline before heading to cenotes. Cell towers sparse between Cancún and Cobá ruins.