Heathrow has SIM and eSIM outlets in the arrivals area of every terminal, so you can get connected within minutes of landing. Sim Local, the airport's dedicated provider, runs 11 stores across Terminals 2, 3, 4 and 5, plus 24-hour self-service digital kiosks in the Terminal 2 and Terminal 5 baggage halls. Heathrow also promotes a free eSIM option through its own website for visitors who would rather set up connectivity before they land.
Where to buy a SIM or eSIM at Heathrow
Sim Local is the main operator, with a shop or kiosk in every terminal:
- Terminal 2 – arrivals and baggage reclaim, plus a 24-hour self-service eSIM kiosk at Belt 6 in the baggage hall
- Terminal 3 – arrivals and baggage reclaim
- Terminal 4 – arrivals, and a second unit just after passport control
- Terminal 5 – arrivals concourse, plus a 24-hour self-service eSIM kiosk in the baggage hall
Staffed stores generally open early, from around 05:30, and run until 21:00–23:00 depending on the terminal, so they cover the vast majority of arriving flights. The self-service kiosks at Terminals 2 and 5 fill the gap for very early or very late landings. Store staff can activate a SIM or eSIM for you on the spot and will also sell power banks, chargers and adapters if you need those too.
Physical SIM or eSIM: which should you choose
Most phones sold in the last five years or so support eSIM, which means you can add a UK data plan digitally without swapping out your home SIM card. This is the more convenient option if your phone is unlocked and eSIM-compatible, since you keep your existing number active for calls and texts on your home network while using the new eSIM purely for UK data. A physical SIM still makes sense if you need a UK phone number, your handset does not support eSIM, or you would rather have a local number for the length of your stay.
Sim Local's Heathrow stores stock nano, micro and standard SIM sizes for older or unlocked phones, and can also help install and activate an eSIM plan in store if you are not confident doing it yourself.
Buying at the airport versus sorting it out before you fly
Buying in the arrivals hall means you can call a taxi, use maps and message people the moment you land, which matters if nobody is meeting you and you need transport. The trade-off is convenience rather than price: airport retail generally carries a premium over shopping around, and if you can activate an eSIM plan from a UK or international provider before you leave home, you can often compare prices and coverage without the pressure of a queue at arrivals. If you do not need data the instant you land, buying a PAYG SIM once you are settled in the city, from a supermarket or phone shop, is usually the cheaper route.
Whichever you choose, ask the retailer to confirm the current price and data allowance before you pay, since bundle sizes and promotions change often and airport pricing is not always published online. Store locations and opening hours in this guide were checked 2026 against Heathrow's own listings, but it is worth confirming opening hours if you are landing very early or very late.
Which networks work best at and around Heathrow
Heathrow sits under good coverage from all four major UK networks (EE, O2, Three and Vodafone), and most SIM and eSIM products sold at the airport run on one of these networks or a virtual operator that piggybacks on them. If you already have an unlocked SIM from a previous UK trip, it will likely still work, though it is worth checking the balance and validity before you rely on it.
Setting up your eSIM after landing
- Clear passport control and collect any checked bags first, since you do not need connectivity for either step.
- Head to the Sim Local desk or kiosk in your terminal's arrivals area.
- Choose a data-only eSIM if you want to keep your home number for calls, or a full SIM/eSIM with a UK number if you need one.
- Ask staff to scan the QR code and activate the plan while you wait, or scan it yourself at a self-service kiosk.
- Confirm data has connected before you leave the terminal, in case you need help troubleshooting.
Alternatives if you would rather not queue
Many UK and international carriers, along with dedicated travel-eSIM apps, let you buy and activate a UK or Europe-wide data eSIM from home before you travel, so it is live the moment you land without a stop in arrivals. This is worth doing if your flight lands very late or very early, since it removes any dependency on a shop being open.
For everything else you need once you touch down, from finding your taxi pickup point to working out the fastest way into London, see our taxis and public transport hub pages.
Frequently asked questions
Is there free WiFi at Heathrow while I sort out a SIM?
Heathrow provides WiFi throughout its terminals, which is normally enough to get a taxi booked or message family while you decide whether you need a local SIM at all.
Can I buy a SIM before I fly to the UK?
Yes. Several UK networks and eSIM providers let overseas visitors buy and activate a UK data eSIM from their home country before departure, so it is ready to use the moment you land.
Do Sim Local kiosks accept card payment?
The self-service digital kiosks at Terminals 2 and 5 are set up for card and contactless payment; check with staff at manned counters for the full range of payment options.
Will my eSIM work in all four Heathrow terminals?
Yes, once activated a UK eSIM or SIM works airport-wide and across the country, not just at Heathrow.
Is buying a SIM at Heathrow more expensive than in central London?
Generally yes. Airport retail carries a convenience premium, so if getting connected the instant you land is not essential, prices are usually lower once you are in the city.
What if my phone is locked to my home network?
A locked phone cannot take a different physical SIM or, in most cases, add a second eSIM profile from another provider, so check with your home carrier about unlocking or ask Sim Local staff whether an eSIM will work on your specific model.