United Kingdom – Landlines and Mobile Phones

What are the international dialling codes for the UK, and what are the area codes for the most popular expat destinations?

The UK’s international calling code is +44. Anyone phoning from outside the country must prefix any UK number with +44. An important rule to remember is that the leading zero of the area code is dropped when dialling from abroad — so London’s 020 becomes +44 20, and Manchester’s 0161 becomes +44 161.

When placing calls within the UK, the national trunk prefix 0 appears at the start of every area code. This zero is omitted when calling from overseas. Within the same local area, you can generally dial without the area code, though certain locations do require it. Mobile phones and Voice over IP services always require the full area code regardless of where you are calling from.

It is worth noting that dialling codes do not map precisely onto administrative or political boundaries. The Coventry code, for instance, serves a broad swathe of Warwickshire, and Manchester’s code encompasses portions of several surrounding towns. The table below lists area codes for the UK cities most commonly chosen by expats:

Certain area codes are frequently cited incorrectly — London is sometimes wrongly given as 0207, and Cardiff as 02920. When sharing a number internationally, always present the complete area code and subscriber number together as one unbroken string. Ofcom provides an official tool for looking up any UK dialling code at ofcom.org.uk.

Geographic UK area codes always begin with 01 or 02. Numbers starting with any other digits are not tied to a physical location. UK mobile numbers begin with 07, and this prefix is used in full when calling a mobile from anywhere within the United Kingdom.

Who are the major landline providers in the UK, and how can you contact them?

BT continues to dominate the UK’s residential landline market, though you are not obliged to go to BT directly — many other providers incorporate home phone services into their own packages. The market is genuinely competitive, with numerous suppliers bundling home telephone access together with broadband and television.

Alongside BT, providers such as Virgin Media, Vodafone, and EE all offer fixed telephone services. The table below summarises the main options available to UK consumers:

Tariffs shift frequently, so always verify current pricing directly on each provider’s official website. As a general rule in 2025, purchasing broadband, home phone, and TV as a combined package from one supplier works out cheaper than arranging each service separately.

There is a major infrastructure change under way that every newcomer should understand. The UK’s PSTN — the old analogue copper telephone network — will be permanently decommissioned in January 2027, and every analogue landline must migrate to a digital service before that date. Digital landlines route calls over a broadband internet connection, so a working internet connection at home is a prerequisite. If broadband is already installed, the digital landline will simply use that connection. Any new landline contract taken out today will already operate on a digital (VoIP) basis.

One consideration that deserves particular attention: because digital landlines depend on mains power, they will not function during a power cut. Anyone who relies on a telecare alarm, personal emergency response device, or similar equipment should seek guidance from their provider about battery backup units or alternative arrangements for emergency situations.

The independent regulator Ofcom publishes complaints data covering all major providers, which can serve as a useful guide when making your choice.

Who are the major mobile phone providers in the UK, and how can you contact them?

The UK’s mobile industry was historically built on four main network operators: EE, Vodafone, O2, and Three. The landscape shifted considerably when the merger of Vodafone and Three concluded in June 2025, producing VodafoneThree — now the country’s largest mobile network by subscriber count, with 27 million customers. There are now effectively three major infrastructure networks operating in the UK.

In addition to these three core networks, the UK hosts a lively ecosystem of Mobile Virtual Network Operators (MVNOs) — companies that purchase access to existing network infrastructure and resell it to consumers, frequently at lower prices and with distinctive plan structures. Well-known MVNOs include giffgaff, Sky Mobile, Tesco Mobile, Lebara, Lycamobile, and SMARTY.

Plan prices change regularly, so always check directly on each provider’s website for the most current figures. As a rough guide for 2025, packages offering 2GB to 5GB of data can be found for around £6 per month, though 10GB to 20GB is a more realistic minimum for everyday use. Some of the best-value deals — offering 20GB to 100GB or more — are available for no more than £10 to £15 per month.

On the question of coverage, Ofcom’s Connected Nations 2025 report confirms that 4G from at least one operator reaches 99% of UK premises. That said, signal quality is far from uniform — rural communities can experience considerably weaker service than towns and cities. RootMetrics named EE the UK’s best overall network in the first half of 2025 and also top for 5G performance. Before committing to any contract, use Ofcom’s mobile coverage checker or each provider’s own coverage map to assess signal quality at the addresses that matter most to you.

How do I get a landline connected in the UK?

Arranging a new landline connection in the UK is a relatively simple process, though it helps to have some context about the ongoing digital transition. Every new landline set up today operates on a digital (VoIP) platform rather than the legacy copper network. New customers are placed onto Digital Voice automatically, while existing PSTN customers are being moved across in regional batches throughout 2025 and 2026.

Both property owners and renters can apply for a landline. Tenants do not generally need their landlord’s consent to take out a phone or broadband contract, though it is sensible to let your landlord know if any physical installation work will be involved. The following steps outline the process for getting a new connection arranged:

1. Choose a provider. Review offers from BT, Sky, Virgin Media, TalkTalk, Vodafone, Plusnet, and other suppliers. Comparison websites such as Uswitch or Ofcom’s comparison tool can help you identify what is on offer at your specific address, since availability varies by postcode.
2. Check availability at your address. Type your postcode into the provider’s website to confirm which packages can be delivered to your home. Note that Virgin Media is unique among major UK providers in offering broadband independently of a phone line, so their service does not require you to have a separate landline in place first.
3. Select a package. Providers typically offer standalone phone deals as well as combined packages that bring together home phone, broadband, and sometimes TV. Add-ons for inclusive evening and weekend calls to UK landlines are very affordable, and you can upgrade to anytime or international call allowances if your needs require it.
4. Provide your details. You will be asked for your name, home address (proof may be requested), and payment information — direct debit is the standard arrangement. Monthly postpaid contracts usually involve a credit check. If you have not yet built up a UK credit history, some providers are more accommodating than others; it is worth calling their customer service team to explain your circumstances.
5. Book any necessary installation. Where no active landline exists at the property, an installation fee of £140 typically applies (as of 2025 — confirm the current amount with your chosen provider before proceeding). Moving to a new home or switching providers may also require a new line or cable to be installed, which your provider can arrange, with costs depending on the package and company selected.
6. Await activation. Timescales differ between providers. When an engineer visit is required, a new connection usually takes one to two weeks; where existing infrastructure is already in place, activation can often happen within a few days. Your provider will confirm a precise activation date when you place your order.
7. Set up your equipment. A home broadband connection is required for the digital landline to work. If broadband is already in place, the new digital line will run through it. Providers normally supply a router and any additional adaptor hardware that may be needed.

For the latest requirements, fees, and expected timescales, speak directly with your chosen provider or refer to Ofcom’s consumer guidance pages.

How do I get a mobile phone SIM card or contract in the UK?

The UK is one of the easiest countries in the world in which to obtain a mobile SIM. New residents, visitors, and temporary workers can all purchase a prepaid pay-as-you-go SIM without needing to present any identification in most circumstances — a striking contrast to places such as Germany, France, or Australia, where identity verification is compulsory for all SIM purchases. Here is how both routes to mobile connectivity work:

Prepaid (Pay-as-you-go) SIM: Free SIM cards from all major networks and most MVNOs are stocked by supermarkets (Tesco, Sainsbury’s, Asda), mobile phone retailers (Carphone Warehouse, Currys), petrol forecourts, and network-branded stores. Once the SIM is inserted, you top it up using a bank card, cash, or a voucher purchased from a shop, and you are typically connected within minutes. Networks such as giffgaff and SMARTY offer free SIMs by post and are especially popular among newcomers for their flexible, no-commitment monthly bundles.

Postpaid (contract) plans: Monthly contracts — whether taken as SIM-only deals or paired with a handset — require identity verification and a credit assessment. You will generally need to supply a valid passport or national identity document, proof of a UK address (a recent bank statement or utility bill is usually acceptable), and to pass a credit check. New arrivals who have not yet established a UK credit history may find 24-month contracts difficult to obtain, but rolling monthly SIM-only plans are often accessible and carry less stringent credit requirements.

MVNOs tend to offer particularly flexible arrangements, including SIM-only deals and 30-day rolling plans with no long-term obligations. These make an excellent starting point for anyone still finding their feet in the country.

All phones sold in the UK since December 2021 are legally required to be supplied unlocked, meaning a handset brought from abroad should work on any UK network. It is worth confirming that your device supports the frequency bands used by UK operators (commonly 800 MHz, 1800 MHz, and 2600 MHz for 4G). If your phone was bought before December 2021 and remains locked to an overseas network, contact that network to request an unlock before you travel.

For the most current plan details and pricing, visit each provider’s website directly. Ofcom’s consumer pages also outline your rights when entering into a mobile contract.

How do I pay my telephone bill in the UK?

UK telephone providers offer a range of payment methods that apply consistently across both landline and mobile services. Bills for postpaid contracts and fixed-line services are generated monthly, and the vast majority of providers encourage customers to pay by direct debit — some even offer a modest discount as an incentive for setting one up at the outset of a contract.

The payment options commonly available across UK providers include:

• Direct debit: The most widely used method. Each month, the billed amount is drawn automatically from your bank account on a predetermined date. You will normally receive advance notification — usually by email — showing the sum to be collected. This functions much like the automated payment systems used in Australia, Canada, and across most of Europe.
• Online banking / bank transfer: Bills can be settled manually through your bank’s online or mobile platform, using the provider’s account details and your customer reference number.
• Provider app or website: Most major providers have account management portals where you can pay by debit or credit card at any time that suits you.
• Phone payment: All significant providers operate automated telephone payment lines where bills can be settled by card via a touchtone menu system.
• In-store: Some providers — notably O2, EE, and Vodafone — accept payments at their high-street stores. PayPoint terminals, which are found in many corner shops and newsagents throughout the UK, can also be used to pay certain provider bills by scanning a barcode from your statement.
• Prepaid top-up: For pay-as-you-go mobile plans, credit can be added through the provider’s app or website, via a freephone number, by buying a top-up voucher from a newsagent or supermarket, or through ATMs at certain banks.

Policies on late payment vary between providers. Most will send a reminder before imposing a late fee or restricting access to services. Service disconnection for non-payment is generally a last resort and only follows an extended period without payment — Ofcom’s rules require providers to communicate transparently with customers experiencing financial difficulty before taking such action. If you are finding it hard to keep up with bills, contact your provider as early as possible; many operate hardship provisions. Free and impartial advice is also available from Citizens Advice.

Are there any practical tips for using phones in the UK as a newcomer?

Once you are connected, there are several day-to-day practicalities worth being aware of that will help you make the most of phone services in the UK.

Number porting: Taking your existing phone number with you when you switch to a new provider is a simple process in the UK. You request a PAC (Porting Authorisation Code) from your current provider — they are legally obliged to supply it within one working day — and pass it to your new provider. The transfer of your number, along with the actual network switch, typically completes within one working day. This is faster than in many other countries; in Australia, for example, the equivalent process generally takes two business days and involves additional steps.

eSIMs: All three major UK networks — EE, VodafoneThree, and Virgin Media O2 — now support eSIM technology. If your handset is eSIM-capable, you can activate a UK number immediately upon arrival without waiting for a physical card to be delivered. Check your chosen provider’s website for device-specific activation instructions.

International roaming from the UK: Since Brexit, automatic free roaming within the EU is no longer guaranteed by UK networks. Each operator now sets its own roaming charges and policies. EE, for example, applies a daily charge of £2.59 for data use in the EU, with weekly and 12-day passes also available. Vodafone offers favourable roaming conditions in over 150 countries and a Roam-free option covering certain European destinations. Three has historically extended free roaming to a selection of countries — verify the current list at three.co.uk. Always check roaming terms before you travel.

Rural coverage: While networks often report covering more than 99% of the UK population, real-world experience can tell a different story — signal quality varies considerably depending on your location, whether you are indoors or outside, and how congested the network is at any given time. If you are relocating to a rural part of Scotland, Wales, or Northern Ireland, it is especially important to scrutinise coverage maps before choosing a network. Where possible, speak to local residents or try a pay-as-you-go SIM from one of the main networks to test signal before committing to a long-term contract.

Wi-Fi calling: All major UK networks support Wi-Fi calling, which routes calls over a broadband connection when mobile signal is poor or absent. This is particularly helpful in older properties, basement flats, or rural homes where signals may struggle to penetrate walls. Once you have a UK SIM, the feature can usually be enabled in your phone’s settings.

Emergency calls: The UK emergency services number is 999. The pan-European number 112 also functions in the UK and can be dialled even without a SIM card or if your registered network has no signal. For non-emergency police matters, call 101. For urgent but non-life-threatening medical concerns, the NHS helpline number is 111.

Phone etiquette: There are no particularly unusual social conventions around mobile phone use in the UK. That said, keeping calls short or stepping outside in quieter settings such as restaurants, medical waiting rooms, or public transport priority areas is generally considered good manners. Many trains and buses designate quiet zones, marked with signs — in these carriages or sections, making or taking phone calls should be avoided altogether.

The UK’s national telephone numbering plan is administered by Ofcom, the independent regulator and competition authority for the country’s communications sector. Ofcom’s website at ofcom.org.uk is the best place to turn for consumer rights queries, provider complaints, and authoritative information on the telecoms landscape.

Frequently Asked Questions

Can I keep my foreign number when I move to the UK?

In most cases, no. UK number porting operates solely between UK-registered providers, meaning a number from another country cannot be transferred to a UK network. You will need to acquire a new UK number. Some international VoIP platforms — such as Skype or Google Voice — may allow you to retain your home country number as a secondary line for receiving calls, but for a standard UK mobile or landline, a UK-issued number is required.

Do I need a local address to get a SIM card in the UK?

For a free prepaid pay-as-you-go SIM, no address or documentation is required in the vast majority of cases — you can purchase one from a shop and be connected within minutes. For a monthly contract or SIM-only plan, you will generally need to supply a UK billing address along with proof of identity and pass a credit check. Some providers will accept a temporary address, such as a hotel or short-term rental property.

Can I use my existing handset from abroad on UK networks?

Usually, yes. All phones sold in the UK since December 2021 must be supplied unlocked by law. If you are bringing a handset purchased abroad before that date, it may still be locked to your home network — contact that network to request an unlock before travelling to the UK. You should also check that your device supports the frequency bands used by UK operators (typically 800 MHz, 1800 MHz, and 2600 MHz for 4G coverage).

What is the process for switching mobile networks in the UK?

Changing networks is a straightforward procedure. Ask your current provider for a PAC (Porting Authorisation Code) — they are legally required to issue one within one working day, either by text message or online. Hand the PAC to your new provider, and the network switch along with the transfer of your number will normally complete within one working day. You are not required to wait until your contract expires, though early termination charges may apply if you leave partway through a fixed-term agreement.

Is 5G widely available in the UK?

5G is rolling out at pace. Coverage data from November 2025 indicates that between 94% and 97% of the UK has outdoor 5G access from at least one network. Indoor coverage and rural availability tend to be considerably lower. EE is consistently regarded as the top performer for 5G, while VodafoneThree’s newly combined network is committing significant investment to further expansion. Use each provider’s coverage map or Ofcom’s checker to see what is available at your specific postcode.

What happens to my landline during a power cut with the new digital system?

The old analogue copper network could carry a small electrical current even when the power was out, meaning handsets still worked during blackouts. Digital VoIP landlines, by contrast, are entirely dependent on mains power and will not function during a power cut. If you rely on your landline for emergency contact or use a telecare alarm, this is an important consideration. Providers are obliged to offer battery backup solutions or equivalent alternatives for vulnerable customers. Ask your provider about the options available, and consider keeping a charged mobile phone as an emergency fallback.

Are there low-cost phone options for people on low incomes in the UK?

Yes. A number of providers offer social tariffs or discounted plans for customers receiving qualifying benefits. BT, for example, makes a BT Basic package available at a reduced rate for those on Pension Credit and certain other benefits. Ofcom publishes an up-to-date list of social tariffs on its website. For mobile use, MVNOs such as giffgaff and SMARTY offer genuinely affordable, flexible plans with no long-term commitment. Check Ofcom’s website and each provider’s official pages for current eligibility criteria and pricing.

Who do I complain to if I have a dispute with my phone provider in the UK?

Your first step should be to raise the complaint with your provider directly. If the matter has not been resolved to your satisfaction within eight weeks, or if your provider issues a formal deadlock letter, you may escalate the complaint to an Alternative Dispute Resolution (ADR) scheme. All UK providers are required by Ofcom to be members of one of two approved schemes: Ombudsman Services: Communications or the Communications and Internet Services Adjudication Scheme (CISAS). Both services are free of charge and have the authority to award compensation or require providers to take corrective action. Full details and links to both schemes can be found on the Ofcom website.