Your US cell phone will work in Los Cabos, but roaming fees add up fast. The best options are an eSIM (Airalo, Holafly) for data-only service that activates before you land, your carrier's Mexico day pass ($10/day for AT&T, Verizon, T-Mobile), or a local Telcel SIM for the cheapest data. WhatsApp is how everyone communicates in Mexico — install it before you fly.
Staying connected in Los Cabos is easy, but the wrong choice can cost you hundreds in roaming fees. Your US cell phone will work, but international roaming rates are steep. The good news is that you have several affordable options: eSIM apps that activate before you land, your carrier's Mexico day pass, or a local Telcel SIM. WhatsApp is essential — it's how everyone from your hotel concierge to tour operators communicates in Mexico. This guide covers the best option for your trip.
Carrier Day Passes
The easiest option for short trips is your US carrier's Mexico day pass. AT&T, Verizon, and T-Mobile all offer plans that let you use your existing data, text, and voice allowance in Mexico for $5-12 per day. T-Mobile's Magenta and Go5G plans include Mexico and Canada at no extra charge, with 5GB of high-speed data per month before throttling. AT&T's International Day Pass is $10 per day, billed only on days you use it. Verizon's TravelPass is $10 per day in Mexico. The advantage is simplicity — your phone just works, with your existing number. The disadvantage is cost — $10/day adds up to $70 over a week-long trip, and you're using your regular data allowance. Check your plan before travel; some premium plans include Mexico for free. If your plan doesn't, an eSIM or local SIM is usually cheaper for trips longer than 3-4 days.
eSIM Apps
eSIMs are the best option for most Cabo travelers. They're digital — no physical SIM to swap — and activate before you land, so you have data the moment you turn your phone on at SJD. Airalo is the most popular, offering Mexico data packages starting around $5 for 1GB / 7 days up to $30+ for larger plans. Holafly offers unlimited data Mexico plans starting around $19 for 5 days, ideal for heavy users. Maya Mobile, Nomad, and aloSIM are other reliable options. eSIMs are data-only — they don't give you a Mexican phone number — but with WhatsApp and FaceTime, that's rarely a problem. To use an eSIM, your phone must be unlocked and eSIM-compatible (iPhone XS and later, most recent Samsung Galaxy and Google Pixel phones). Install the eSIM app and download the plan before you leave home, then activate it after takeoff or on arrival. Your regular US number stays active for emergency calls and texts via your home carrier.
Local SIM Cards
For the cheapest data, buy a local Telcel SIM card. Telcel has the best coverage in Baja California Sur — including along remote Highway 19 to Todos Santos and the East Cape — while AT&T Mexico and Movistar have weaker rural coverage. Telcel SIMs cost about 100-200 pesos and come with prepaid data; you can add more at any OXXO store. Tourist SIM kits are sold at the SJD airport (look for the Telcel kiosk), at Telcel stores in downtown Cabo San Lucas and San José, and at many OXXO stores. The catch: installing a physical SIM means removing your home SIM, which means your US number isn't reachable unless you have a dual-SIM phone. For most short trips, an eSIM is more convenient than a physical SIM. For longer stays of a month or more, a Telcel SIM is the cheapest option. Ask the salesperson to activate the SIM and verify it works before leaving the store.
WiFi in Cabo
Free WiFi is everywhere in Los Cabos — at every resort, restaurant, cafe, and many bars. Resort WiFi is usually strong enough for video calls and streaming, though speeds can dip during peak evening hours. Most restaurants and cafes post WiFi passwords on the receipt or wall. If you're working remotely from Cabo, expect resort WiFi to handle email, video calls, and most tasks, but not heavy uploading. For guaranteed speed, a portable hotspot from your eSIM or local SIM is more reliable. Some upscale resorts charge for premium WiFi; ask at check-in. The airport has free WiFi throughout all terminals. Avoid logging into banking or sensitive accounts on public WiFi without a VPN — public networks in tourist areas can be monitored. A VPN app (NordVPN, ExpressVPN, ProtonVPN) is a smart purchase for any international travel. If you only need data for messaging and maps, free resort and restaurant WiFi may be enough — but for navigation, photos, and reliability, an eSIM or SIM is worth it.
WhatsApp & Calling
WhatsApp is essential in Mexico. It's how hotels confirm reservations, tour operators coordinate pickups, drivers find you, and friends text. Install it before you fly, and verify your number with your home SIM active. Most resorts, restaurants, and tour operators list WhatsApp as their primary contact. Save key contacts — your hotel concierge, airport shuttle driver, tour operator — as WhatsApp contacts before arrival. For calling US numbers from Cabo, WhatsApp, FaceTime, and Skype all work over WiFi or data, bypassing international calling fees. Your regular phone calls and texts via your home carrier work but cost $1-3 per minute and $0.50 per text without a plan — use WhatsApp instead. For emergency calls to 911, your home carrier works without a plan; emergency calls are required to connect on any available network. For non-emergency calls, ask your hotel front desk to help — many will place local calls for you at no charge. Finally, download offline maps in Google Maps before you fly, so you can navigate even without data.
FAQ
Will my US cell phone work in Los Cabos?
Yes, but international roaming fees add up. Your carrier likely offers a Mexico day pass ($5-12/day) that lets you use your existing data and voice allowance. T-Mobile's premium plans include Mexico and Canada at no extra charge. Check your plan before travel.
What's the best eSIM for Cabo?
Airalo is the most popular, with Mexico data packages starting around $5 for 1GB / 7 days. Holafly offers unlimited data plans starting around $19 for 5 days, ideal for heavy users. Install the eSIM before you leave home, then activate after takeoff or on arrival.
Does Telcel have good coverage in Los Cabos?
Yes. Telcel has the best coverage in Baja California Sur, including along remote Highway 19 to Todos Santos and the East Cape. AT&T Mexico and Movistar have weaker rural coverage. For longer stays, a Telcel SIM is the cheapest option.
Is WiFi good in Cabo resorts?
Yes, usually. Resort WiFi is generally strong enough for video calls and streaming, though speeds can dip during peak evening hours. Free WiFi is also available at restaurants, cafes, and the airport. Avoid logging into banking on public WiFi without a VPN.
Do I need WhatsApp for Cabo?
Yes. WhatsApp is how everyone in Mexico communicates — hotels confirm reservations, tour operators coordinate pickups, drivers find you. Install it before you fly and verify your number with your home SIM active. Save key contacts as WhatsApp contacts before arrival.
Can I call 911 from my US phone in Cabo?
Yes. Emergency calls are required to connect on any available network, even without a plan or SIM. For non-emergency calls, use WhatsApp, FaceTime, or Skype over WiFi or data to bypass international calling fees.
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