Why an Argentine checkout asks for a DNI
The DNI (Documento Nacional de Identidad) is Argentina's national identity number. Mobile lines in Argentina are registered to a person, and the registration form is built around that number, so a prepaid SIM checkout — online or in a shop — will show a DNI field first.
That field is not a test of your nationality. It is the default shape of the form. The question is whether the operator you are standing in front of has a working foreign-passport path that day, and whether the person serving you knows how to use it.
What visitors can legitimately do
There is no way around identity registration, and there should not be. What exists is a passport route. In practice, a visitor who wants an Argentine prepaid line has three realistic options:
| Option | What it involves | Best for |
|---|---|---|
| Operator shop with passport | Visit a Claro, Personal or Movistar store with your passport, ask specifically for the foreign-visitor registration, expect a form and a wait | Stays of several weeks where you need an Argentine number |
| Kiosk or reseller SIM | Sometimes sold, but activation and registration still have to be completed properly, and the passport path is less reliably supported | Travellers with time and Spanish to spare |
| Travel eSIM (data only) | Buy online before you fly, install at home, no DNI, no registration, no shop visit | Almost every short trip and most long ones |
Two things to be clear about before you choose. First, never let anyone suggest using another person's DNI, a made-up number or a borrowed identity — that is fraud, it can get the line cut, and it is not a workaround. Second, a roaming data eSIM does not give you an Argentine phone number by default. If you need a local number for a bank, a landlord or a long-term contract, the eSIM is not a substitute for the shop visit; if you need maps, messages, bookings and ride-hailing, it is more than enough.
Activation and top-up checks before you pay
If you decide to go the local-SIM route, treat these as conditions to verify at the counter, not assumptions:
- Registration: ask explicitly whether the shop can register a foreign passport today, and ask to see the form before you pay.
- Activation timing: ask when the line activates — immediately, or after a delay.
- Top-up: ask how a foreign visitor recharges. This is the step that most often breaks, because recharge flows are also built around local identity and local payment methods.
- Validity: ask how long the credit or package lasts, and what happens when it expires.
- Your phone: if you plan to keep your home SIM active for calls and use an eSIM for data, check that your handset supports dual eSIM or SIM plus eSIM before you travel — our phone compatibility page walks through the check.
If any of those answers is vague, that is your signal to stop and use the eSIM route instead.
Compare a local line with a roaming eSIM
| Local Argentine SIM | eSIM Americas South America plan | |
|---|---|---|
| Identity needed | Passport registration, in person | None |
| Where you buy | Shop or reseller in Argentina | Online, before you fly |
| When it works | After activation | On landing, once you turn data roaming on |
| Local phone number | Yes | No — data only |
| Cross-border use | Argentine network only | Peru, Argentina, Chile, Brazil and Ecuador on one plan |
| Price basis | Operator's own prepaid rates | From US$12.99, tax included, prices checked 16 October 2026 |
The South America plan is a single prepaid eSIM for Peru, Argentina, Chile, Brazil and Ecuador. In each country it roams on a partner network and your phone shows that network's name. Argentina's three networks — Claro, Personal and Movistar — each won a 5G block in October 2023, and Movistar now belongs to Telecom, the company behind Personal. The eSIM roams on a partner network rather than a fixed one, so what you see on your screen depends on where you are.
For a trip that stays in Argentina, that is still the simplest way to be online from the moment you clear Ezeiza. If you are moving around the region, it removes a second purchase at every border — see Multi-Country eSIM South America for how that works in practice, and eSIM South America Coverage for what to expect country by country.
Before you land at Ezeiza
The airport is the worst place to solve this. Arrival halls mean queues, tired staff and, for a visitor, a registration conversation in a second language. Install and test your eSIM at home instead: buy the plan, scan the QR code, and confirm the line shows in your settings while you still have your home Wi-Fi to fall back on.
Two practical notes. The QR code appears on your order page seconds after payment — bookmark that page before you leave it, because the link arrives by email and there is no public order lookup. And if you are heading to the capital first, our Buenos Aires eSIM guide and the Buenos Aires airport (EZE) arrival guide cover the first hours in more detail.
If you are weighing a named operator eSIM instead, eSIM Claro Argentina sets out what that involves — and why the registration question does not disappear just because the product is digital.
What to buy
For Argentina, eSIM Americas sells the South America eSIM: one prepaid plan covering Peru, Argentina, Chile, Brazil and Ecuador, so one QR code covers the whole trip. Install it at home and you are online when you land in Buenos Aires, with a full refund if it does not work. Plans start at US$12.99 for 3 GB over 7 days, with 5 GB over 15 days at US$19.99 and 10 GB over 30 days at US$34.49 — prices checked 16 October 2026, tax included, and you pay by card on the next page, which shows the total with tax before you pay.
