Can a tourist register a prepaid SIM in Mexico in their own name?

In some cases it's possible, but depending on the shop and carrier the process may require additional documents. For short-term tourists this isn't always practical.

What should I do if my local SIM has stopped working?

If the problem is related to registration, topping up your balance won't help. By installing an eSIM over Wi-Fi, you can be back online within a few minutes.

Is a travel eSIM part of Mexico's registration?

No. Because a foreign travel eSIM works over international roaming, it isn't part of Mexico's local prepaid registration system.

Will an eSIM give me a Mexican phone number?

Most travel eSIMs provide mobile internet only. WhatsApp, Telegram and other internet-based services work without problems.

How many GB of internet is enough for a 10-day trip to Mexico?

For most users, 3–5 GB is enough. For those who make video calls every day or share a lot of media, choosing a 10 GB or larger package is more sensible.

Is your prepaid SIM in Mexico suddenly not working? The 2026 registration and the most practical fix

LSThe LimitSim team

You bought a local prepaid SIM in Mexico, used it without any problems for a few days, and then suddenly your internet and mobile service cut off entirely. Your balance is still there, your phone works, but there's no network.

In most cases this isn't a phone fault. From 2026, Mexico is rolling out phased registration of mobile lines, and some prepaid numbers that don't meet the registration requirements can be deactivated.

For a tourist, the main difficulty is that the documents and procedures required in the local registration process may not be practical for someone on a short trip. A foreign travel eSIM, on the other hand, stays outside this process because it doesn't have a local Mexican number.

What changed in 2026?

Under the new telecommunications legislation adopted in 2025, Mexico's system for identifying mobile numbers has been updated.

Under the new rules:

prepaid and postpaid mobile lines must be tied to their owner;
identity verification is required at registration;
the process is being rolled out in stages throughout 2026.

The goal of these changes is to reduce the number of anonymous mobile lines.

For a tourist, the consequence is simple: a prepaid SIM that isn't properly registered may lose service at some point.

Who is at risk?

Those who usually work without problems:

officially registered local SIMs;
contract (postpaid) numbers;
hotel and airport Wi-Fi networks;
foreign travel eSIMs.

Cases that carry risk:

prepaid SIMs bought in a hurry from the street or a small shop;
cards not fully registered in the owner's name.

Not every prepaid SIM is necessarily deactivated, but it's impossible to know in advance which number will be affected and when.

Why isn't a travel eSIM affected?

A travel eSIM works not as a local subscriber of a Mexican carrier, but as an international roaming profile.

Your phone connects to mobile networks in Mexico, but the profile you're using belongs to a foreign carrier.

Because of this:

no CURP is required;
you don't enter the local registration process;
your line isn't deactivated because of prepaid registration.

You still use the same mobile networks — just not as a local prepaid subscriber.

What should you do before going to Mexico?

Check that your phone supports eSIM.
Buy an eSIM plan for Mexico while you're still in your home country.
Install the eSIM profile over Wi-Fi via the QR code.
After you arrive in Mexico, enable data roaming.
Select the eSIM as your primary mobile internet line.

That way, there's no need to buy a local SIM or go through registration procedures.

How much data should you choose?

For most tourists:

3–5 GB — enough for a typical 7–10 day trip (Google Maps, WhatsApp, social networks and photo sharing).
10 GB — better for users who make video calls every day or upload lots of photos/videos.
20 GB or more — for travelers who use a hotspot or work on the road.

Honest expectations

While a travel eSIM removes many problems, there are a few things to keep in mind.

An eSIM is mainly for mobile internet and in most cases does not provide a local Mexican phone number.
Network quality depends on the region. In Mexico City, Cancún, Guadalajara and other big cities coverage is strong; in remote areas it can weaken.
Your phone must support eSIM and be unlocked (not carrier-locked).

Land in Mexico with internet that just works

Instead of dealing with local prepaid SIM registration, setting up an eSIM before your trip is the more convenient choice.

With LimitSim you can get a Mexico plan in a few minutes. The QR code is sent to your email immediately, you finish the setup at home, and your internet is ready to use the moment you arrive in Mexico.

Browse Mexico plans: eSIM for Mexico

Frequently asked questions

Can a tourist register a prepaid SIM in Mexico in their own name?: In some cases it's possible, but depending on the shop and carrier the process may require additional documents. For short-term tourists this isn't always practical.
What should I do if my local SIM has stopped working?: If the problem is related to registration, topping up your balance won't help. By installing an eSIM over Wi-Fi, you can be back online within a few minutes.
Is a travel eSIM part of Mexico's registration?: No. Because a foreign travel eSIM works over international roaming, it isn't part of Mexico's local prepaid registration system.
Will an eSIM give me a Mexican phone number?: Most travel eSIMs provide mobile internet only. WhatsApp, Telegram and other internet-based services work without problems.
How many GB of internet is enough for a 10-day trip to Mexico?: For most users, 3–5 GB is enough. For those who make video calls every day or share a lot of media, choosing a 10 GB or larger package is more sensible.