What is the best way to get a SIM card and mobile data?

Claro has the widest coverage (best outside cities), with Movistar, Tigo, and WOM as solid, often cheaper alternatives in urban areas. Prepaid is easy: buy a SIM at any store or mall kiosk with your passport, then top up data online or at any tienda. Plans are inexpensive; if coverage matters for travel or remote work, lean Claro.