You land at AICM, take out your phone, and want Google Maps, Uber, and WhatsApp working before you leave the terminal. An eSIM for Mexico City activated from home gives you data as soon as you touch down, with no queues or searching for a physical SIM. In this guide, we'll tell you about coverage, GB depending on the number of days, and how to get around CDMX connected.
Is an eSIM worth it in Mexico City?
Yes. An eSIM connects you to Mexican networks as soon as you land at AICM, without changing your physical card or paying your operator's roaming fees. You buy it and install it before your trip, and it activates when you arrive in the city.
The classic alternative is to use European or American roaming, which outside your zone costs around €10-20 per day and can skyrocket if you're not careful. Buying a physical SIM at an Oxxo or the airport involves queuing, providing documentation, and losing your number while you use it. An eSIM avoids all of that: you keep your usual line for calls and bank SMS, and use Mexican data for browsing. For a weekend getaway or a long week in CDMX, it's the most convenient and predictable option for spending. If you want the full picture for the country, check out our guide to eSIM for Mexico.
Coverage and operators in Mexico City
CDMX is one of the best-covered areas in the country. A good eSIM relies on Telcel, the network with the most antennas and best 4G/5G in the capital, with AT&T and Movistar as backup for some coverage.
In practice, within the metropolitan area, you'll have a stable signal 99% of your day: metro (on platforms and many stations), Reforma, the Historic Center, Coyoacán, or Xochimilco. It might be weaker in very dense indoor markets or in some sections of metro tunnels, which is normal in any big city. Telcel is the benchmark network in the capital because its coverage reaches peripheral areas and the highway if you take an excursion to Teotihuacán or Puebla. Before buying, check that your phone is eSIM compatible; we explain this in the guide on how to know if your phone supports eSIM.
Tip: activate the eSIM as your data line and leave your Spanish SIM only to receive bank SMS. This way you avoid any accidental roaming data charges.
Internet at the airport: AICM and AIFA
Both airports in the capital have free WiFi, but it's slow during peak hours and requires registration. With the eSIM already installed, you leave the plane with your own data and can call an Uber without relying on the airport's network.
AICM (Benito Juárez) is the main airport and is about 30-40 minutes from the city center depending on traffic; its WiFi works but gets saturated when several flights land at once. AIFA (Felipe Ángeles) is further away, to the north, and having your own data there is even more useful for checking bus routes or taxi prices before getting in. In both cases, the eSIM connects automatically when you switch off airplane mode, without going through the airport WiFi. If this is your first trip with this technology, take a look at eSIM vs. roaming to see the real cost difference.
How many GB do you need for your getaway?
It depends on the number of days and how much you use Maps and social media. As a quick reference: for a weekend, 1-2 GB is enough, and for a full week of moving around a lot, 3 to 5 GB is more than enough if you use hotel WiFi at night.
The biggest consumer in CDMX is Google Maps with active navigation, because you'll be using it a lot between the metro, taxis, and the city's long distances. WhatsApp, Instagram, and looking for restaurants consume little in comparison. This table gives you an honest guide:
| Duration | Estimated usage | Recommended GB |
|---|---|---|
| Weekend (2-3 days) | Maps + social media + messaging | 1-2 GB |
| Getaway (4-5 days) | Daily tourist usage | 2-3 GB |
| Full week | Intensive Maps + photos | 3-5 GB |
| Week + outside excursions | Road navigation | 5 GB or more |
If you usually upload a lot of videos or stream, round up. We have a dedicated guide on how much data you need for traveling with a breakdown by app.
Connection by areas: Centro, Polanco, and Roma-Condesa
Coverage is good throughout the city, but each area has its own reality. In the Historic Center and Zócalo, the signal is strong outdoors and a bit weaker inside colonial buildings with thick walls.
Polanco and Reforma have the best 5G coverage in the city, ideal if you're traveling for work or want to upload content quickly. Roma and Condesa, the trendy neighborhoods for cafes and nightlife, have plenty of street and terrace signal. In Coyoacán and Xochimilco, further south, the network remains solid outdoors; on the Xochimilco trajineras, you'll have data for almost the entire journey. If your plan includes an excursion to the pyramids of Teotihuacán, expect stretches of road where only Telcel provides a stable signal, so an eSIM supported by that network makes a difference there. To avoid overspending between strolls, these tricks for saving data abroad will help.
How to install the eSIM step-by-step
Installation takes less than a minute and can be done from home, using your WiFi. You buy the plan, receive a QR or activation link, add it in your phone settings, and leave it ready to connect when you arrive in Mexico.
The process is identical for iPhone and Android: you go to Settings, look for the option to add an eSIM or data plan, scan the QR, and choose when to activate it. Our advice is to install it in Spain and activate the data only when you land in CDMX, so you take advantage of the validity days from the very first moment. You have the complete details in how to install an eSIM and, for startup, in how to activate your eSIM. For any questions, our Spanish-speaking support is available 24/7.
Frequently asked questions
Does the eSIM work as soon as I land at AICM?
Yes. If you installed it before traveling, it connects to the Mexican network as soon as you turn off airplane mode upon landing at AICM or AIFA. You don't need WiFi or to configure anything else; the data starts automatically, and you can order an Uber from the arrivals gate.
Can I still use WhatsApp with my Spanish number?
Yes. WhatsApp is linked to your number, not to the SIM you use for data. You keep your usual number, and the eSIM only provides the internet connection, so you chat and make video calls normally using Mexican data.
How many GB do I use when running Google Maps in the city?
Google Maps consumes around 5 MB per hour of active navigation, which is more than it seems if you have it open all day. For a multi-day getaway to CDMX, a 2-3 GB plan covers Maps plus social media and messaging comfortably.
Do I need a different eSIM if I go to Teotihuacán or Puebla?
No. The same eSIM for Mexico covers you throughout the country, including excursions outside the capital. Just note that on the road, stable coverage mainly depends on the Telcel network, which is the most widespread in rural areas.
What happens if I run out of data halfway through my trip?
You can top up or buy a new plan from your phone in minutes, without reinstalling anything. That's why it's advisable to estimate your GB with a margin before leaving, although you always have the option to extend it on the go.
Conclusion
Getting around Mexico City with data from minute one changes your trip: Maps, Uber, and WhatsApp working as soon as you leave AICM, without queues or bill surprises. Calculate your GB based on the number of days, install the eSIM at home, and activate it upon arrival. Prepare your CDMX getaway with PuraSim's eSIM and forget about connection worries.
