Internet in the UK for Tourists: eSIM, SIM Card and the Tube
Internet in the UK for tourists: a data eSIM installed at home or a pay-as-you-go SIM, no ID needed. Tube mobile coverage is at 70% and growing.
Contents
For internet in the UK as a tourist, you can install a data-only travel eSIM at home or buy a pay-as-you-go SIM from EE, Vodafone, O2 or Three on arrival. At the time of writing, neither needs ID. On the London Underground, 4G and 5G now cover most of the network. Matrimix sells UK data eSIMs in its Telegram wallet, without a bank card.
Key facts (October 2026)
- Four networks: EE, Vodafone, O2 (Virgin Media O2) and Three. Vodafone and Three merged into VodafoneThree in 2025 but still run as separate brands. Other providers use these networks.
- No SIM registration: the UK has no legal requirement to register a SIM, and pay-as-you-go needs no credit check. Contracts do involve a credit check.
- EU visitors: since Brexit, the EU's "roam like at home" rules don't cover the UK. Some EU operators still include it; others charge.
- The Tube: in October 2026 the Mayor of London said 4G and 5G coverage on the Underground had reached 70% and is on track to cover the whole network by the end of the year.
- Our eSIM is data only: no UK number, no calls, no SMS.
Current plans and prices: eSIM UK. Visiting other countries on the same trip? Some Europe plans include the UK; check the country list of each plan.
Your options compared
| Option | UK number | ID | Set up before the flight | Watch out for |
|---|---|---|---|---|
| Travel eSIM (data only) | No | None asked for a Matrimix eSIM | Yes | No UK number; phone needs eSIM |
| Pay-as-you-go SIM | Yes | Not required by law | Some providers post SIMs abroad; otherwise buy on arrival | Physical SIM replaces your home SIM unless you have dual SIM |
| Home roaming | Your home number | — | Nothing to do | EU rules no longer cap charges in the UK |
| Free Wi-Fi | — | — | — | Patchy on the move; Tube station Wi-Fi works through UK providers |
UK mobile networks: EE, Vodafone, O2 and Three
EE belongs to BT, O2 is part of Virgin Media O2, and Vodafone and Three merged in May 2025 into VodafoneThree, now wholly owned by Vodafone; both brands carry on. Budget brands run on one of these four networks.
Coverage is usually good in towns and cities; in rural and hilly areas it can be weaker and varies by network. Ofcom, the UK regulator, runs a free Map Your Mobile checker: enter a postcode and it shows predicted 4G and 5G coverage for EE, Vodafone, O2 and Three. Ofcom notes that coverage is based on operators' predictions and real experience can vary.
Do you need ID for a UK SIM?
At the time of writing, no. The UK has no SIM registration rule; in 2007 the government told Parliament that compulsory registration would bring no significant benefit. Ofcom describes pay-as-you-go as having no long contract and no credit check. Pay-monthly contracts are different: the provider runs a credit check, so they suit residents rather than visitors.
A travel eSIM avoids the question entirely: no passport or ID is asked for a Matrimix eSIM.
Mobile signal on the London Underground
The Tube long had no mobile signal below ground. Transport for London (TfL) and Boldyn Networks are now building 4G and 5G coverage with all four UK networks, in stations and in the tunnels between them.
- Now: the whole Elizabeth line has coverage, and so do large sections of the Central, Jubilee, Northern, Victoria, Piccadilly, Bakerloo, District, Circle and Metropolitan lines, according to TfL.
- Progress: in October 2026 the Mayor of London put coverage at 70% of the Underground, with the rest due by the end of 2026. Big stations such as King's Cross St Pancras, Victoria and Paddington are going live in phases.
- Station Wi-Fi: every Tube station has Wi-Fi, but it is delivered through UK providers' Wi-Fi services for their own customers. With a foreign SIM or travel eSIM you may need a paid pass from Virgin Media WiFi, so mobile data is usually the easier route.
Because all four UK networks take part in the rollout, a travel eSIM roaming on any of them can usually pick up signal wherever a section is live.
Before you go: setting up your eSIM
- Check the phone. It needs eSIM support and no carrier lock. Dial
*#06#: an EID line means eSIM. Models: eSIM compatible phones. - Buy the plan. In @MatrimixBot open Services → Travel SIM cards and choose the UK under Popular or All countries, or a Europe plan under Regions. The price is shown in USD before you confirm. USDT or USDC pay directly; another coin on the balance is swapped automatically at the quoted rate.
- Install at home over Wi-Fi. You get a QR code, manual-entry details (SM-DP+ address and activation code) and, on iPhone with iOS 17.4 or newer, a one-tap install button, in the Mini App and in Profile → Purchases.
- On arrival, switch mobile data to the eSIM and turn on data roaming for that line. Validity starts at the first connection to a network in the UK, so use it on the trip you bought it for.
Keep your home SIM on as the second line for bank SMS, with data roaming off on it if your home plan charges in the UK. Hotspot usually works, though some networks may limit it.
Good to know
- Data only: no UK number, no calls, no SMS. Use calling and messaging apps.
- New plan instead of a top-up: when data runs out, buy another plan as a new eSIM in a couple of taps. Data left is shown on the order page.
- One installation: keep the eSIM profile until the trip ends. A bought eSIM can't be returned; a failed order is refunded to your balance automatically.
- Telegram wallet: you buy in the Matrimix wallet in Telegram, and Matrimix holds your balance for you — no seed phrases and no extra apps.
- Compatibility: the phone needs eSIM support and no carrier lock — check with
*#06#before you buy.
Sources
- TfL: improving digital connectivity on our network, current Tube coverage
- TfL: whole Tube network on track for mobile coverage by end of the year, June 2026
- Mayor of London: action to improve mobile signal, Tube coverage at 70%
- TfL: mobile phones and Wi-Fi underground
- Ofcom: Map Your Mobile coverage checker
- Ofcom: choosing the right mobile package, pay as you go
- Hansard: written answer on compulsory registration of pay-as-you-go SIMs, 2007
- European Commission: roaming Q&A, the UK and roam like at home
- VodafoneThree: completion of the Vodafone and Three merger
Read also
FAQ
Do I need ID to buy a SIM card in the UK?
At the time of writing, no: the UK has no legal requirement to register a pay-as-you-go SIM. Pay-monthly contracts involve a credit check. A Matrimix eSIM needs no passport or ID either.
Is there mobile signal on the London Underground?
On a growing share of it. The whole Elizabeth line and large sections of other lines have 4G and 5G, and the Mayor of London put coverage at 70% in October 2026, with the whole network due by the end of the year.
Does a Europe eSIM work in the UK?
Some Europe plans include the UK and some don't, so check the country list of the plan on the Europe eSIM page before you buy.
Does the Matrimix UK eSIM include a UK phone number?
No. It is data only: no number, no calls, no SMS. Use messaging and calling apps, and keep your home SIM on for bank SMS.
