VOXI

Short answer: my UK shortlist

If I were choosing a UK mobile plan today, I’d start with SIM-only unless you genuinely need a new handset. The brands I’d actually shortlist are:

1. EE — best all-round network quality/speed, but usually pricier.
2. SMARTY or iD Mobile — best cheap/high-data SIM-only options if VodafoneThree/Three coverage is good where you live.
3. Giffgaff — best simple, popular, no-fuss rolling plans on O2’s network.
4. Lebara — best budget plan if you want VodafoneThree coverage plus international minutes/EU roaming.
5. Tesco Mobile — best for customer service/family plans, especially if O2 coverage is good and you use Clubcard.
6. VOXI — good VodafoneThree-based choice for social/video-heavy users and students.
7. O2 or Sky Mobile — worth it mainly for perks: O2 Priority/Virgin Volt, or Sky’s data rollover and Sky-customer benefits.

Before buying, check your exact postcode. Ofcom’s checker compares 4G/5G signal by EE, O2, Three and Vodafone, and warns that buildings/trees/walls can make real-world indoor signal differ from predictions. (ofcom.org.uk)

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Best UK mobile plans by use case

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My top 5 recommendations

1. EE — choose this if you want the safest “it just works” network

Pick EE if you care more about coverage, speed and reliability than getting the absolute cheapest bill. It’s the one I’d choose for commuting, travel around the UK, rural-ish areas, or if your phone is important for work. It is often more expensive, so check for retention deals or work/student discounts.

Best product to look for: EE SIM-only, ideally 20GB–100GB depending on usage, or a handset plan only if the total cost beats buying the phone outright.

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2. SMARTY — best cheap rolling SIM for lots of data

SMARTY is a strong default if you want a low-cost 30-day plan with plenty of data and no long commitment. It’s particularly good if VodafoneThree/Three signal is solid where you live and work. Expert Reviews picked SMARTY as best budget network and noted its 30-day flexibility. (expertreviews.co.uk)

Best product to look for: SMARTY 30-day SIM with 40GB–100GB, or unlimited if it’s on promo.

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3. Giffgaff — best no-fuss popular option

Giffgaff is one of the easiest recommendations for normal users: simple app, flexible “goodybags,” no pushy contracts, and widely used. It runs on O2, so it’s great if O2 signal is good in your area — but avoid it if O2 is congested where you live, work or commute.

Best product to look for: Giffgaff monthly goodybag around 20GB–100GB, or an 18-month “good contract” if the saving is meaningful.

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4. Lebara — best cheap Vodafone-based plan

Lebara is ideal if you want a cheap SIM, VodafoneThree coverage, EU roaming and international minutes. It’s particularly good for people who call abroad or want a low monthly bill without much fuss. Ofcom’s customer-service research found Lebara, Tesco Mobile and Giffgaff customers were more likely than average to be satisfied with value for money. (ofcom.org.uk)

Best product to look for: Lebara 20GB–50GB SIM-only, especially via MSE/Uswitch-style introductory deals.

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5. Tesco Mobile — best for families and customer service

Tesco Mobile is a very sensible choice if O2 coverage is good for you, especially for households with multiple lines. It often has Clubcard pricing and family perks, and Ofcom data is favourable for Tesco Mobile on signal satisfaction, value and complaint handling. (ofcom.org.uk)

Best product to look for: Tesco Mobile Clubcard SIM-only or family plan.

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What I’d avoid

• Don’t buy a 24–36 month handset contract without doing the maths. Often, buying the phone outright or on 0% finance plus a cheap SIM is cheaper.
• Don’t choose purely by national rankings. Your postcode matters more than the national average.
• Don’t overbuy data. MSE notes many people use far less than they think; it recommends checking actual usage and signal first. (moneysavingexpert.com)
• Be careful with annual price rises. Since January 2025, providers must state mid-contract price increases in pounds and pence before you sign. (moneysavingexpert.com)
• If you use an old phone, check 4G calling/VoLTE support. UK 3G is now switched off, and Three has no 2G fallback, so older devices may stop working properly for calls/text/data. (ofcom.org.uk)

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My final pick

For most people in the UK:

• Best premium choice: EE
• Best cheap choice: SMARTY
• Best balanced everyday choice: Giffgaff
• Best Vodafone-based budget choice: Lebara
• Best family/customer-service choice: Tesco Mobile

If you tell me your rough area/postcode district, monthly data use, whether you need EU roaming, and whether you want SIM-only or a phone included, I can narrow this to 2–3 specific plans.

Best UK Mobile Phone Plans & Networks (2026)

The UK mobile market is built around four main networks — EE, O2, Three, and Vodafone — with dozens of budget "piggyback" brands (MVNOs) running on their infrastructure. You can buy your mobile plan from a large number of providers, but many of them are running on the same networks, as there are only 4 UK mobile networks: EE, Three, Vodafone and O2, and giffgaff uses the O2 network.

Here's how to think about which one to actually get:

🏆 Best Overall Coverage & Speed: EE

EE is the best all-round mobile phone network in the UK, leading on 4G coverage, 5G availability, and average download speed. It's the go-to if you travel a lot or live somewhere with patchy signal on other networks.

💰 Best Value / Cheapest: Three

Three is consistently the cheapest mobile phone network, often by a significant margin. Good if price is your main concern and you're not chasing the absolute fastest speeds.

🥇 Best "No-Frills" Value Brand: Giffgaff (runs on O2)

This is genuinely one of the most popular choices among everyday UK users because of its flexibility and price. It won Best overall mobile provider and Best Mobile Network for Speed in this year's Mobile Network Awards, and also ranked top three for Value, Most Recommended, Customer Service and Sim-Only Contracts. 59% of its customers would recommend it and only 9% would discourage others from signing up. Giffgaff offers some great deals on its commitment-free monthly plans, while throwing in more data if you're happy to sign up for 18 months.

🛒 Best for Perks & Family Deals: Tesco Mobile (runs on O2/VMO2 network)

Very popular thanks to Clubcard tie-ins. Tesco Mobile offers SIM-only deals from £7.50 per month, with cheaper Clubcard prices on some plans and free EU roaming. Its customer service scores are exemplary both in independent surveys and Ofcom's research, and it still offers free EU roaming plus useful Family Perks if you take out more than one plan on an account. The trade-off: it relies on Virgin Media O2's core network, so you won't get the best speeds or coverage, particularly for 5G connections.

📺 Best for Perks/Entertainment: Sky Mobile

Popular with existing Sky TV/broadband customers. Sky Mobile is consistently strong across surveys, winning Best for Handset Contracts and Best for Perks, plus it has fantastic SIM-only deals and Pay Monthly bargains with a "Piggybank" feature.

Other widely-used budget brands worth knowing:

• Smarty, Voxi, Lebara, iD Mobile — these operate on rolling monthly contracts, giving flexibility to buy more data when needed and switch to a cheaper plan when you don't.
• Monzo Mobile — a newer entrant. Digital "challenger bank" Monzo launched Monzo Mobile using the Virgin Media O2 network, exclusively via eSIM.

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Quick recommendation summary:

One practical tip before signing up:

If you’re looking for a mobile plan in the UK, the most important thing to know is that you should almost certainly avoid a direct contract with the "Big Three" physical networks (EE, O2, and VodafoneThree).

While these giants own the masts, they are notorious for locked-in contracts and mid-contract price rises (usually tied to CPI inflation plus an extra 3.9% every April). Instead, savvy mobile users in the UK use MVNOs (Mobile Virtual Network Operators). These are smaller providers that "piggyback" on the major networks' signals but offer far cheaper, more flexible 30-day rolling plans with no price hikes.

The Vodafone and Three merger (now operating together as VodafoneThree) has consolidated the physical network landscape to just three players: EE, O2, and VodafoneThree.

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1. Best Overall Value & No-Fuss: SMARTY

• Network it uses: VodafoneThree (Three’s infrastructure).
• Why people use it: SMARTY is arguably the most recommended budget network in the UK. It operates entirely on 30-day rolling contracts (meaning you can cancel or change your plan at any time) and guarantees no mid-contract price rises.
• The Perks:
  • Unlike the major networks, EU roaming is still free (up to a 12GB monthly limit).
  • No credit checks—you just pay upfront like a subscription.
  • Group plans offer 10% off for families or multiple SIMs.
  • Super cheap deals, regularly offering packages like 30GB+ of data for around £8 a month.
• Downsides: There is no customer service telephone number; support is entirely handled via online chat.

2. Best for Social Media & Youth: VOXI

• Network it uses: VodafoneThree (Vodafone’s infrastructure).
• Why people use it: VOXI (owned by Vodafone) is incredibly popular with students and heavy phone users because of its "Unlimited Social Media" perk.
• The Perks:
  • Any data you use on Snapchat, Instagram, TikTok, WhatsApp, Facebook, and Messenger does not count towards your monthly data cap.
  • They also offer "Unlimited Music" and "Unlimited Video" add-ons.
  • Runs on 30-day flexible plans with no contract commitments.
• Downsides: Since Brexit, they have introduced a daily fee for EU roaming, so it’s not the best if you travel to Europe frequently.

3. Best for New Handsets & Data Rollover: iD Mobile

• Network it uses: VodafoneThree (Three’s infrastructure).
• Why people use it: Owned by Currys, iD Mobile is the go-to provider if you actually need a new phone (like the latest iPhone or Samsung Galaxy) on contract rather than just a SIM. They consistently offer the cheapest monthly handset deals in the UK.
• The Perks:
  • Excellent for SIM-only plans too, featuring Data Rollover (unused data rolls over to the next month).
  • Free EU roaming in 50 destinations.
  • Easily set "bill caps" via their app so you never accidentally overspend.

4. Best for Supermarket Perks & High Street Support: Tesco Mobile

• Network it uses: Virgin Media O2.
• Why people use it: Tesco Mobile is consistently rated as a Which? Recommended Provider for outstanding customer service. It is highly popular with families and older users who prefer being able to walk into a physical Tesco store to speak to someone if something goes wrong.
• The Perks:
  • Clubcard Prices: If you have a Tesco Clubcard, you unlock significantly cheaper "Clubcard Price" mobile plans.
  • They freeze prices for the duration of your contract if you are a Clubcard member.
• Downsides: You usually have to sign up for a longer 12 or 24-month contract to get the best rates.

5. Best for Flexibility on the O2 Network: giffgaff

• Network it uses: Virgin Media O2.
• Why people use it: giffgaff is a UK classic. It pioneered the "no contract, run-by-the-community" model. You buy monthly rolling "monthly plans" (formerly called Goodybags) and can stop or change them whenever you want.
• The Perks:
  • High flexibility, great community support forum, and cheap rates.
  • Free EU roaming (capped at 5GB per trip).
• Downsides: Because O2 is highly popular, its network can suffer from data congestion in busy city areas (especially parts of London). Since giffgaff piggybacks on O2, its users can sometimes have their speeds temporarily slowed down during peak congestion times.

6. Best for Rural Coverage & Speed (on a Budget): 1pMobile or Spusu

• Network it uses: EE.
• Why people use it: If you live in the countryside, the Scottish Highlands, or Wales, EE has by far the best and fastest signal. However, EE's direct plans are incredibly expensive. Savvy users who need EE’s superior coverage sign up for 1pMobile or Spusu instead.
• The Perks:
  • Both give you full access to EE's lightning-fast 5G network at a fraction of the price.
  • Extremely cheap—you can get basic plans starting around £4 to £10 a month.

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Summary: Which one should you choose?

• Go with SMARTY if you want the absolute best overall value, hate contracts, and want to keep free EU roaming.
• Go with VOXI if you spend all your time on social media apps like Instagram and TikTok.
• Go with Tesco Mobile if you already shop at Tesco, have a Clubcard, and want the security of high-street customer service.
• Go with 1pMobile if you live in a rural area and need EE's top-tier coverage without paying EE's high prices.

Local Tip: Before you order any SIM, always drop your postcode into the Ofcom Mobile Coverage Checker online to make sure the underlying physical network (EE, O2, or VodafoneThree) has a strong 5G or 4G mast near your house or workplace!

If you want the best cell phone plans in the UK, the strongest picks are usually SMARTY, Lebara, giffgaff, iD Mobile, Voxi, and the big networks EE, Vodafone, O2, and Three. For most people, the best value comes from MVNOs like SMARTY and Lebara, while EE is often the premium choice for coverage and speed.

Top brands people actually use in the UK

• EE — widely treated as the premium network and one of the four main UK networks.
• Vodafone — one of the main networks; often chosen for stronger brand coverage and direct-network deals.
• O2 — one of the main networks, commonly used for handset bundles and family-style plans.
• Three — one of the main networks and a common choice for unlimited-data deals.
• SMARTY — a popular cheaper option on the Three network; MSE and other comparison sites frequently rank it highly for value.
• Lebara — often recommended for low-cost SIM-only plans, especially smaller-data users; MSE names a 5GB Lebara SIM as its top pick at that data level.
• giffgaff — a familiar UK SIM-only brand often used for flexible, no-contract plans.
• iD Mobile — often stands out for extras like EU roaming and rollover data.

Best choices by use case

Practical shortlist

• Best overall value: SMARTY.
• Best low-data deal: Lebara.
• Best premium network: EE.
• Best for unlimited data: Three or SMARTY, depending on price and coverage needs.
• Best flexible beginner option: giffgaff.

If you want, I can turn this into a “best UK phone plans by budget” list, such as under £10/month, unlimited data, or best for iPhone/Android upgrades.

Here’s a practical rundown of the best UK mobile phone plans and the networks people actually use. Most people go SIM-only these days unless they want a specific phone on instalments.

The 4 big UK networks (all with 5G)

• EE — Best all-round coverage and reliability, especially in rural/remote areas. It’s the fastest in many tests, but you pay a premium. Good if you travel around the UK a lot and just want it to work.
• Vodafone — Strong coverage across the UK and solid 5G. Often includes extras like free roaming in many countries, and its “VeryMe” perks. A good middle-ground for reliability and price.
• O2 — The largest network by customers. Coverage is solid, and you get access to O2 Priority (freebies and concert pre-sale). Customer service is generally well-regarded. Often a bit pricier if you go direct.
• Three — All about data. Best if you stream, tether, or want unlimited data for the lowest price. The catch is that coverage can be patchier indoors and in rural areas.

The best “actual people’s choices” — MVNOs

These piggyback on the big networks but offer far better value. Most people I know in the UK are on one of these:

• Lebara (Vodafone network) — Excellent value for SIM-only deals, and brilliant for international calls. Often has cheap deals like 30–60GB for £6–8 a month. Uses Vodafone coverage, so it’s reliable.
• giffgaff (O2 network) — Very popular and flexible. No credit check, monthly Goodybags, and free roaming in the EU. Great customer community and cheap PAYG options.
• Smarty (Three network) — One of the cheapest around, with rolling monthly contracts. You can often get 100GB for around £10 and unlimited for ~£15. No roaming in EU unless you buy add-on? Actually Smarty includes EU roaming now, but check current terms.
• Voxi (Vodafone network) — Great for social media data. Plans include unlimited data for social media apps (TikTok, Instagram, Snapchat, WhatsApp) plus your normal data. Ideal if you’re a heavy social user and don’t want to burn through your allowance. Also has no contract — 30-day rolling.
• Tesco Mobile (O2 network) — Popular for families because you get “Clubcard” rewards and good customer service. EU roaming included. It’s on O2’s network at a lower price.
• iD Mobile (Three network) — Great value bundles with regular price drops. Often has cheap finds — like 30GB for £8 or so. Runs on Three’s network.

Recommendations by need

• Best all-round reliability: EE directly — their Full Works / All Rounder SIM plans. Pricier, but excellent coverage and extras.
• Best budget value on a big network: Lebara or Smarty. If you’re after cheap data and don’t need flashy extras, one of these wins.
• Best for heavy data users: Three or Smarty — unlimited data plans often under £15–20. Three’s 5G is fast where it’s available.
• Best for O2 fans who want cheaper: giffgaff for flexibility, or Tesco Mobile if you shop at Tesco.
• Best for social media junkies: Voxi. Unlimited social media data plus a rolling contract.
• Best if you want a new phone too: Check the big four directly or via **

The top UK mobile networks are EE, Vodafone, O2, and Three, offering reliable coverage and fast internet, while budget-friendly MVNOs like SMARTY, giffgaff, and VOXI provide affordable alternatives using the same networks.

Main Networks

EE – Best Coverage Nationwide

EE provides excellent coverage across both urban and rural areas, with fast 4G and 5G speeds, making it the most reliable network overall +1. SIM-only plans start from around £10–15 per month for 10–20GB of data, and EVouchers and family plans offer extra perks. EE also supports several MVNOs like Lyca Mobile, Your Co-op, and 1p Mobile for flexible alternatives.

Three – Best Value for Data

Three offers some of the fastest 5G speeds in the UK and is ideal for users who need high data allowances at reasonable prices +1. A typical plan offers 30GB for £20 per month, with free roaming in 71 countries, including contract and PAYG options. MVNOs on Three include SMARTY, iD Mobile, and Superdrug Mobile, which provide cost-effective, flexible SIM-only deals.

Vodafone – Strong All-Rounder

Vodafone delivers reliable coverage in cities and provides 50GB for £20 per month plans with high-speed internet +1. It is especially convenient for frequent travelers, as it offers roaming in 150+ countries. VOXI and Lebara operate on Vodafone’s network, offering youth-focused and international-friendly plans respectively.

O2 – Premium Service and Perks

O2 excels in customer service and perks, including 15,000+ free Wi-Fi hotspots and priority access to concerts and events +1. Plans typically start at £30 per month with 20GB of data, offering unlimited calls and texts. MVNOs like giffgaff, Sky Mobile, and Tesco Mobile use O2’s network, providing more affordable and flexible options.

Popular Budget-Friendly MVNOs

SMARTY: Cheapest SIM-only option, from £10/month with 10GB data, flexible and no price increases. giffgaff: Community-driven network with £6/month plans, points for referrals, and 5G included. VOXI: Designed for social media use, unlimited social apps, plans £10–15/month. Sky Mobile: Offers data rollover and flexible plan adjustments, ideal for moderate users. iD Mobile: Stable plans with 5G and no annual price hikes, starting around £6/month.

Choosing the Right Plan

Assess Data Needs: Light users may manage on 5–10GB/month, medium users on 20–30GB, and heavy users on 50GB+. Network Coverage: Check provider coverage at your home and work using Ofcom’s checker to avoid poor signal in specific areas. International Use: If you travel often, consider roaming fees or choose networks like O2 with free EU roaming. Handset vs SIM-only: SIM-only plans are generally cheaper long-term if you already have a phone, whereas handset contracts spread device costs over 12–24 months.

Summary Recommendation

Best overall: EE for coverage and speed. Best for high data: Three. Balanced choice: Vodafone. Best perks & events: O2. Budget-friendly: SMARTY, giffgaff, VOXI, Sky Mobile, iD Mobile.

Switching networks is easy via Ofcom’s text-to-switch PAC system, and most providers support eSIMs for convenience finder.com. This combination ensures flexibility and lets you pick a plan that suits both your usage and budget.

The best mobile phone networks in the UK depend on whether you prioritize raw speed, cheap data allowances, or customer service. The UK mobile market consists of four major network operators (EE, O2, Vodafone, and Three) and several highly popular Mobile Virtual Network Operators (MVNOs) that piggyback on those networks to offer much cheaper, contract-free rolling plans.

If you are looking for a new plan, moving to a no-contract, 30-day SIM-only rolling plan is what most people in the UK actually do to get the best value.

The Most Popular UK Mobile Networks

VOXINetwork Infrastructure: Runs on the Vodafone network, providing excellent indoor coverage and strong urban speeds.Key Benefit: Includes "Unlimited Social Media" as a standard feature, meaning scrolling apps like Instagram, TikTok, and WhatsApp does not count toward your data allowance.Contract Flexibility: Operates on strict 30-day rolling terms with no fixed contract lock-ins, making it incredibly popular with younger users.Drawbacks: Requires a paid daily pass to roam within the EU. Tech Advisor +2 Network Infrastructure: Runs on the Vodafone network, providing excellent indoor coverage and strong urban speeds. Key Benefit: Includes "Unlimited Social Media" as a standard feature, meaning scrolling apps like Instagram, TikTok, and WhatsApp does not count toward your data allowance. Contract Flexibility: Operates on strict 30-day rolling terms with no fixed contract lock-ins, making it incredibly popular with younger users. Drawbacks: Requires a paid daily pass to roam within the EU. SmartyNetwork Infrastructure: Owned and powered entirely by Three UK.Key Benefit: Known as one of the best budget operators, frequently offering huge data chunks (like 30GB or 100GB) for around £7 to £10 per month.Data Rollover: Any unused data is automatically calculated and converted into a cash discount off your next month's bill.Contract Flexibility: Strictly 30-day rolling plans with zero commitment required. The Telegraph Network Infrastructure: Owned and powered entirely by Three UK. Key Benefit: Known as one of the best budget operators, frequently offering huge data chunks (like 30GB or 100GB) for around £7 to £10 per month. Data Rollover: Any unused data is automatically calculated and converted into a cash discount off your next month's bill. Contract Flexibility: Strictly 30-day rolling plans with zero commitment required. GiffgaffNetwork Infrastructure: Runs on the Virgin Media O2 network infrastructure.Key Benefit: Frequently voted the best overall mobile network by consumer groups due to immense flexibility and community-driven support.Roaming Perks: Still includes free EU data roaming allowances on many of its standard rolling plans, unlike the major networks.Contract Flexibility: Completely contract-free monthly "goodybags" that you can adjust, pause, or change whenever you need. Rick Steves +3 Network Infrastructure: Runs on the Virgin Media O2 network infrastructure. Key Benefit: Frequently voted the best overall mobile network by consumer groups due to immense flexibility and community-driven support. Roaming Perks: Still includes free EU data roaming allowances on many of its standard rolling plans, unlike the major networks. Contract Flexibility: Completely contract-free monthly "goodybags" that you can adjust, pause, or change whenever you need. Tesco MobileNetwork Infrastructure: Operates using the Virgin Media O2 network.Key Benefit: Consistently wins the highest marks for customer service, featuring physical help desks inside larger Tesco supermarkets.Loyalty Perks: Free Tesco Clubcard holders get steep price discounts, and you can pay off your phone bill using grocery shopping points.Free Roaming: Continues to include EU roaming as part of its baseline tariffs. Tech Advisor +1 Network Infrastructure: Operates using the Virgin Media O2 network. Key Benefit: Consistently wins the highest marks for customer service, featuring physical help desks inside larger Tesco supermarkets. Loyalty Perks: Free Tesco Clubcard holders get steep price discounts, and you can pay off your phone bill using grocery shopping points. Free Roaming: Continues to include EU roaming as part of its baseline tariffs. EENetwork Infrastructure: Owns and operates the largest independent network in Britain.Key Benefit: Ranked as the fastest 4G and 5G network in independent Opensignal and RootMetrics testing, making it best for streaming and remote coverage.Drawbacks: Premium monthly pricing compared to MVNOs, and many cheaper tiers cap your maximum speeds unless you pay for top-end packages.Contract Flexibility: Best if you are looking to bundle a brand new handset device on a traditional 24-month payment contract. Expert Reviews +4 Network Infrastructure: Owns and operates the largest independent network in Britain. Key Benefit: Ranked as the fastest 4G and 5G network in independent Opensignal and RootMetrics testing, making it best for streaming and remote coverage. Drawbacks: Premium monthly pricing compared to MVNOs, and many cheaper tiers cap your maximum speeds unless you pay for top-end packages. Contract Flexibility: Best if you are looking to bundle a brand new handset device on a traditional 24-month payment contract.

Side-by-Side Network Comparison

How to Pick the Right Plan

Check Your Local Signal First: Network performance in the UK is heavily regionalized. Before purchasing, plug your current postcode into the Ofcom Mobile Coverage Checker to make sure you get good indoor signal where you live and work. Avoid the "Big Four" Direct Contracts Unless Buying a Phone: Going straight to EE, Vodafone, O2, or Three often locks you into a lengthy contract with mid-year inflation price increases. Piggyback MVNO brands (like Smarty or Voxi) use the exact same phone towers for a fraction of the price. Keep an Eye on EU Roaming: If you travel to Europe frequently, choosing an operator like Lebara or Giffgaff will save you massive amounts of money, as they do not charge daily fees to use your standard data allowance on the continent.

If you'd like to narrow this down, let me know:

Do you need a brand new phone handset, or do you already have one (SIM-only)? Do you have an estimate of how many gigabytes of data you use every month? Are you planning to make frequent international calls outside of the UK?