How does mobile data work in Mexico for tourists?

Tourists in Mexico can access mobile data in three main ways: roaming with their home carrier, using a local physical SIM, or activating an eSIM. Roaming is convenient but often expensive unless your plan specifically includes Mexico. Local SIMs from providers like Telcel or AT&T Mexico are widely available but require time to purchase and set up after arrival. An eSIM lets you activate a Mexico data plan in advance, connect to local networks as soon as you land, and typically pay much lower rates than standard roaming while keeping your home number active.