Before you start

An unlocked handset — a carrier-locked phone will reject a Colombian SIM
Your passport, which the law requires for registering any prepaid line
Your IMEI, from *#06#
A purchase receipt for a foreign-bought handset, in case the carrier asks during IMEI registration
A cédula de extranjería for a postpaid contract or a home-internet installation

Step-by-step

1
Arrive connected with an eSIM
If your handset takes an eSIM, install a Colombia plan from Airalo, Holafly or your own carrier before you fly. Simón Bolívar airport sits south of the city near Pozos Colorados, twenty to thirty minutes from the centre, and arriving with data means you can order a fixed-price app ride rather than negotiating at the rank in a tourist city. Plans start around US$5 and only start counting when you first connect.
Mobile appWho: You5–10 minutes before departure; activates on arrivalUS$5–50 depending on data and days
2
Buy a prepago SIM at an official store
Claro, Movistar, Tigo and WOM all have stores in Buenavista and Ocean Mall and along the main avenues. Show your passport and the clerk registers the line in your name. The SIM is free to about COP 6,000. Avoid buying from street sellers in the centre or on the Rodadero beachfront, where price and provenance are both uncertain.
In personWho: You, at a carrier store15–30 minutesCOP 0–6,000 (under US$2) for the SIM
3
Register the handset's IMEI the same day
Colombia's anti-theft device database blocks unregistered foreign handsets after roughly twenty to thirty days, preceded by warning SMS in Spanish that are easy to ignore. Ask the clerk to register it at the counter: they need your passport and the IMEI from *#06#, and may ask for the phone's receipt. In a city with a lot of phone snatching, this is also the mechanism that makes a stolen phone worthless.
In personWho: Carrier store staff, or you in the carrier app5 minutes to submit; up to ~2 business days to take effectFree
4
Top up with recargas and pick a bundle
Prepaid runs on recargas bought in the carrier app, at corner shops and pharmacies showing a recarga sign, or in supermarkets. A monthly bundle typically costs COP 16,000–45,000 for roughly 10–35 GB with unlimited calls and messages, and most bundle WhatsApp traffic free. Dial *611# on Claro to check your balance and find your own number.
Mobile appWho: You2–5 minutes, any timeCOP 16,000–45,000 (~US$5–14) a month
5
Get fibre on the coastal corridor, and check hard anywhere inland
Claro, Tigo and Movistar sell fibre along the strip from the centre through Gaira and El Rodadero to Pozos Colorados and Bello Horizonte, and coverage there is good. Behind that line, toward the Sierra foothills, Bonda and the Minca road, it thins fast and some addresses have nothing but mobile. Ask the landlord which provider is already installed and run a speed test during the viewing rather than after the move.
OnlineWho: You, with the provider and the landlordInstallation a few days on the corridor; longer or impossible inlandCOP 70,000–160,000 (~US$22–50) a month
6
Plan for interruptions, not just for bandwidth
Air-e has been under Superintendencia intervention since 2024 and localised cuts happen; Essmar's supply is intermittent enough that the district declared a public calamity. A small uninterruptible power supply keeps the router and laptop alive through a dip, and a mobile data fallback configured in advance keeps a call going when the fibre does not. If you work on calls for a living, ask whether the building has a generator before you ask about the internet speed.
In personWho: YouFirst weeksA small UPS runs COP 200,000–400,000

Documents you’ll need

Passport, mandatory for registering any prepaid line
IMEI number from *#06#
Purchase receipt for a foreign-bought handset, for IMEI registration
Cédula de extranjería for a pospago contract or home fibre installation

Things most newcomers don’t know

The romantic addresses — the Sierra foothills, the Minca road, out toward Tayrona — are exactly the ones with no fibre.

Santa Marta's fixed network follows the coastal corridor and stops where the ground rises. People fall for a finca in the hills with a view over the bay, sign, and then find that the only connection is a mobile signal that the terrain also blocks. If you work online, treat the internet check as a condition of the viewing inland, not an afterthought.

Source: Colombian fixed-broadband coverage; local terrain

Resilience matters more than speed here, because both the power and the water are unreliable.

Air-e has been under state intervention since 2024 and Essmar's supply problems led the district to declare a public calamity. A hundred-megabit connection is no use during a cut. A UPS, a configured mobile hotspot and a building with a generator are worth more to a remote worker in Santa Marta than the difference between two fibre tiers — and they are the questions nobody asks at a viewing.

Source: Superintendencia de Servicios Públicos — Air-e intervention; Essmar supply alerts

Register your handset's IMEI the day you buy the SIM — and in a tourist city that registration is also your anti-theft protection.

Colombia maintains positive and negative IMEI databases so that stolen handsets become unusable, and a device that never enters the positive list is treated as unverified and blocked after roughly twenty to thirty days. Phone snatching is the commonest crime a resident here will actually experience, and a registered device is one you can have blocked immediately rather than one that simply disappears.

Source: MinTIC / CRC device registration rules

Prepaid needs only a passport; postpaid needs a cédula, credit history and usually a Colombian bank account.

Your first months are prepago whether you like it or not, and the subsidised handsets and best data plans sit behind pospago. Knowing this in advance saves a wasted store visit trying to negotiate a bundled phone before your cédula exists.

Source: Colombian carrier onboarding requirements (2026)

Common mistakes to avoid

Renting inland or in the foothills on the assumption that Santa Marta's coastal fibre coverage extends there.
Optimising for connection speed while ignoring whether the building has a generator.
Skipping IMEI registration and losing network access three or four weeks in.
Buying a SIM from a street seller on the Rodadero beachfront rather than an official store.
Working from home with no mobile data fallback configured in a city with intermittent power.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.

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