Stay Connected in Mexico City

Mexico City's connectivity is, on the whole, better than most travelers expect. 4G LTE blankets pretty much everywhere you'd want to go, from Roma Norte cafes to the top of Chapultepec, and 5G has rolled out across most central boroughs. What catches people off guard is the gap between glossy network maps and the lived experience: speeds in Polanco or Condesa are excellent. But step into the metro tunnels or a basement mezcaleria in Centro Histórico and you'll lose signal entirely. Public WiFi is everywhere (the city runs free hotspots in many plazas), though it tends to be slow and unencrypted. The other surprise is how affordable mobile data is in Mexico City compared to most North American or European cities, which changes the calculus on whether to bother with an eSIM at all. One last thing. Worth knowing before you land. Your hotel WiFi will likely be the weakest link in your week.

Three carriers matter in Mexico City: Telcel, AT&T Mexico, and Movistar. Telcel is the heavyweight. Owned by América Móvil, it has the most consistent coverage across the metro area, including the harder-to-reach corners of Iztapalapa and the hills around Magdalena Contreras. If you only care about central neighborhoods (Roma, Condesa, Polanco, Centro, Coyoacán), all three perform well enough that the choice barely matters. AT&T Mexico typically offers the best value on prepaid tourist plans and has solid 5G in the central boroughs. Movistar is the budget option, with coverage that's fine in the city but thins out faster on day trips to Teotihuacán or Tepoztlán. Real-world 4G speeds in Mexico City tend to land between 30 and 80 Mbps on Telcel and AT&T, with 5G pushing well past 200 Mbps in Polanco and Santa Fe. Metro coverage is patchy at best. Fair warning. Download your offline maps before you descend. Coverage gets spotty once you're outside the central valley, most notably across the southern xochimilco canals.

Public WiFi in Mexico City is everywhere and mostly fine for casual browsing. But worth treating with appropriate caution. Hotel networks tend to be the weakest link, often shared across all guests with minimal segmentation, which means anyone else checked in can potentially sniff unencrypted traffic. Airport and cafe WiFi (you'll see plenty of both in Roma Norte and Condesa) carries similar risks. Travelers make attractive targets, since they're often logging into banking, booking sites, and email from unfamiliar networks. A VPN encrypts your traffic between your device and a trusted server, which neutralizes most of the risk on public networks. NordVPN is one solid option, with servers in Mexico that won't slow your connection noticeably. The practical rule. If you're checking your bank balance or logging into anything sensitive from a cafe in Centro Histórico, run the VPN. Reading the news? Less critical.