Getting a SIM Card ("Chip") in Mexico

Chip, recarga, and the new registration rule — explained.

In Mexico the SIM card is a chip, and the easiest place to get one is not a phone store — it's the OXXO on the corner, along with 7-Eleven and Walmart. Telcel has the widest coverage by far; AT&T and Movistar work fine in cities. You top up ('hacer una recarga') at the same OXXO, or in the carrier's app.

One thing changed in 2026: Mexico introduced a mandatory SIM registration law in January, and the rules have been revised during the year. As a foreigner you register with your passport; implementation varies by store, so confirm at purchase that the registration is done — an unregistered line can be suspended. (Rules are still shifting; check current guidance before you travel.)

Vocabulary

Spanish	English
el chip	SIM card(Same word as most of LATAM.)
la recarga	top-up('¿Me da una recarga de cien?')
el saldo	balance / credit
prepago	prepaid(The default for foreigners; postpaid needs residency.)
los datos	mobile data
la cobertura	coverage(Telcel's is the argument-ender outside cities.)
el paquete	data bundle(Recargas often activate a paquete of GB plus social apps.)
dar de alta	to register / activate(Used for the 2026 registration: 'hay que darlo de alta'.)
el folio	reference number(OXXO hands you one on the ticket after a recarga.)

Real dialogues

Practice both sides out loud.

Chip and recarga at the OXXO

An OXXO in Mexico City. Tú, with the national politeness of diminutives.

You
¿Tienen chips de Telcel?
Do you have Telcel SIMs?
Cajero
Sí, ¿chip amigo? Ahorita se lo doy.
Yes, an 'amigo' chip? I'll get it for you right now.
You
Sale. ¿Y me hace una recarga de cien de una vez?
Great. And can you top it up with 100 right away?
Cajero
Claro. ¿El número es el del chip nuevo?
Sure. Is it the new chip's number?
You
Sí, el nuevito.
Yes, the brand-new one.
Cajero
Listo. Ahí viene su folio en el ticket.
Done. Your reference number is on the receipt.
You
Gracias. Oiga, ¿el registro del chip se hace aquí o dónde?
Thanks. Say, is the chip registration done here, or where?
Cajero
Ahorita en la app, o en un centro Telcel.
Right now in the app, or at a Telcel center.

Mexico local tips

The OXXO is your phone company

Chips and recargas at any OXXO, 7-Eleven, Walmart or Bodega Aurrera. Official Telcel and AT&T stores are mainly for postpaid plans and problems.

Telcel wins outside the cities

AT&T and Movistar are fine in CDMX, Guadalajara and tourist zones. If you'll travel the country, Telcel's coverage is the safe pick.

The 2026 registration is real

New SIMs must be registered (passport for foreigners). The rules arrived in January 2026 and were revised mid-year, and enforcement varies by store. Ask at purchase: '¿Ya quedó registrado el chip?'

Recargas activate paquetes

A recarga isn't just credit; most amounts trigger a data-plus-social-apps bundle for a set number of days. The confirmation SMS tells you what you got.

Diminutives are the register

'Un momentito', 'el nuevito', 'una recarguita'. Mirror it and you instantly sound less foreign. Note too that the cashier's two 'ahoritas' above mean very different amounts of time.

Practice prompts

01Buy a chip and a 100-peso recarga at an OXXO, and ask whether the registration is done.
02Ask which carrier has better coverage where you're headed.
03Read a Telcel confirmation SMS aloud and explain to a friend, in Spanish, what your paquete includes.

FAQs

Do tourists need ID to buy a SIM card in Mexico?

Since January 2026, yes — Mexico introduced mandatory SIM registration, and foreigners register with a passport. The rules were revised during 2026 and store-level practice varies, so confirm at purchase that your chip is registered.

Where do Mexicans buy SIM cards and top-ups?

At convenience stores — OXXO above all. Chips and recargas are a counter transaction, no phone store required.

Which Mexican carrier has the best coverage?

Telcel, clearly, once you leave the big cities. AT&T and Movistar are credible in urban areas.