Power & Connectivity (SIM)
Connectivity may vary by region and season.
Voltage & Plug Types
Electrical standards and outlet shapes
The UK runs on 230V / 50Hz and uses the Type G plug — the distinctive three rectangular pins. This differs from most of Europe (Type C/E/F), so bring a Type G / UK adapter, and check your devices are dual-voltage.
- Voltage
- 230V / 50Hz
- Plug
- Type G (3 rectangular pins)
- Adapter
- UK / Type G adapter needed
- Most phones/laptops are 100–240V; check the label
Buying a SIM Card
Where to buy, costs, and activation process
Main networks are EE, O2, Vodafone and Three. Prepaid (pay as you go) SIMs are sold at airports, supermarkets and phone shops. Since Brexit, EU roaming is not automatically free — if travelling on to Europe, check your UK plan's roaming charges.
- Networks
- EE, O2, Vodafone, Three
- Where
- Airports, supermarkets, shops
- EU roaming
- Not automatically free (post-Brexit)
- ID may be requested when buying a SIM
eSIM & Mobile Wi-Fi
eSIM availability and portable Wi-Fi rental
If your phone supports eSIM, you can buy a UK or Europe data plan online before arrival and activate on landing — no physical SIM needed. UK operators and global providers (e.g. Airalo) offer eSIMs; some Europe plans cover the UK too.
- Best for
- eSIM-capable phones
- Buy
- Online before arrival
- Providers
- UK operators + global eSIM
- Confirm your phone is carrier-unlocked and eSIM-ready
Wi-Fi Availability
Public Wi-Fi coverage and security
Wi-Fi is common in hotels, cafés, pubs and many public spaces, and free at major airports and stations. Many trains and the London Underground offer Wi-Fi. Use public networks with care; avoid banking on open Wi-Fi or use a VPN.
- Hotels/cafés
- Widely available
- Transport
- Wi-Fi on many trains, Tube
- Security
- Care on open networks
- Mobile data is often more reliable than public Wi-Fi
Internet Restrictions & VPN
Blocked services and VPN recommendations
The UK has open internet. Google, WhatsApp, social media and international apps all work normally, and a VPN is not required. Some adult sites use age verification, and only the usual public Wi-Fi security caution applies.
- Access
- Open internet
- Apps
- Google/WhatsApp/social work
- VPN
- Not required
- A VPN is optional, mainly for public Wi-Fi security
Useful Local Apps
Must-have apps for transport, translation, and maps
Handy apps: Google Maps and Citymapper for getting around; TfL Go and National Rail / Trainline for London transport and trains; Uber, Bolt or local taxi apps for rides; Google Translate if needed. Download offline maps for rural areas.
- Maps
- Google Maps / Citymapper
- Transport
- TfL Go / Trainline / National Rail
- Rides
- Uber / Bolt / taxi apps
- Save offline maps before rural or hiking trips
International Calls
How to make international calls and alternatives
The UK country code is +44. For emergencies dial 999 (112 also works). UK numbers include a leading 0; from abroad dial +44 then drop the leading 0. Messaging apps over data are cheapest for staying in touch.
- Country code
- +44
- Emergency
- 999 (or 112)
- From abroad
- +44, drop leading 0
- Use WhatsApp/data calls to avoid roaming voice charges