10 Best Sim Only Deals UK – Compare Cheap Plans & Offers

In this article, I researched the Best SIM Only Deals UK so that you can use your mobile phone affordably and flexibly without having to buy a new device.

Whether you require generous amounts of data, excellent network coverage, or unique advantages, these deals cater to all needs. Let us evaluate the leading providers and what makes their SIM-only plans unique in the UK market.

key Points & Best Sim Only Deals UK List

Network	Key Point
Vodafone SIM-only	Extensive coverage and reliable network
VOXI	Youth-focused, flexible plans with social media perks
Lebara SIM-only	Affordable international calls and data
Lycamobile	Great for international calls, competitive prices
Tesco Mobile	Runs on O2 network, offers Clubcard points
Sky Mobile	Rolling data plans, easy data sharing
Honest Mobile	Budget-friendly, simple plans with fair usage
SMARTY	Pay-as-you-go style with unused data cashback
iD Mobile	Runs on Three network, competitive data offers
Giffgaff	Community-driven, flexible plans with no contracts

10 Best Sim Only Deals UK

1.Vodafone SIM-only

Vodafone SIM only deals are amongst the best in the UK market considering their deals are backed by reliable 4G and 5G coverage across the country. They offer various packages, catering from light users to heavy data consumers.

Customers are able to enjoy fast speeds, inclusive roaming in various destinations, and even some entertainment subscriptions on select plans.

For those seeking contracts, the reason Vodafone is a top choice is because of their wide coverage giving them constant connectivity. With the competitive pricing of the SIM deals offered along with the regular promotions, they are a great addtion for mobile users in the UK.

Feature	Details
Network Coverage	Extensive UK 4G & 5G coverage
Plan Flexibility	Multiple data allowances, from light to heavy users
Roaming	Inclusive roaming in many countries
Extras	Entertainment subscriptions on select plans
Contract Options	Mostly flexible, some 30-day or longer contracts
Reliability	Strong and stable network

2.VOXI

VOXI combines flexibility and affordability with some of the best sim only deals in the UK. VOXI users are offered great coverage and 5G speeds, courtesy of Vodafones award winning network.

A defining feature of VOXI plans is ‘Endless Social’, which allows users to tweet, tag, and scroll through Instagram without it affecting their data allowance.

In addition, VOXI plans come with unlimited calls and texts ranging from 8GB to 300GB of data. Most plans offered by VOXI are contract-free, meaning you can cancel anytime. Heavy data users may find the £20/month plan boasting 300GB of data appealing.

For mildly heavy data users, the £12/month plan comes with 75GB of data and unlimited video streaming on YouTube and Netflix for £12 a month. VOXI refuses to raise prices mid contract, making them ideal for customers looking to save money.

Feature	Details
Network Coverage	Vodafone’s 4G & 5G network
Youth-Focused	Plans aimed at younger users
Endless Social	Unlimited social media use without data cost
Contract	No contract, cancel anytime
Data Plans	Range from 8GB to 300GB
Streaming Perks	Unlimited video streaming on some plans

3.Lebara SIM-only

One of the most affordable SIM-only deals in the UK can be found with Lebara, as they offer great flexibility alongside no credit checks. Their plans are powered by Vodafone, which guarantees both coverage and 5G access.

For example, for £5/month, you can get 5GB of data, 1000 minutes, and 1000 texts, as well as 100 International minutes to over 40 countries. Another popular option is the £8/month which comes with 20GB of data and unlimited UK calls and text as well as 100 International minutes.

Unlike other mobile providers, Lebara Mobility offers contract-free terms. This allows customers to switch or cancel whenever they want.

They also provide EU roaming and don’t increase prices mid-contract, which is why Lebara is in high-demand from cost-conscious customers who desire flexibility, international calling options, and coverage.

Feature	Details
Network Coverage	Uses Vodafone network for 4G/5G
Affordable International Calls	Includes international minutes to 40+ countries
Contract	Pay-as-you-go or no contract
Data Options	Various data allowances
Roaming	EU roaming included
No Credit Check	Suitable for all credit types

4.Lycamobile

Lycamobile has some of the best SIM-only plans in the UK such as The UK Plan Smart which includes 5 GB of data, unlimited calls, 100 international minutes, and is available for £5 per month. Additionally, the National Plus plan includes 20GB for £5 the first month and £10 for subsequent months.

It is important to note that students get 15GB for £3, and family plans start from £20 for a month. Other benefits include EU roaming, 5G access, no credit checks, cancel anytime policies, and flexibility with rolling 30 day plans.

Feature	Details
Network Coverage	Operates on major UK networks with 5G
Flexible Plans	Rolling 30-day plans, no long contracts
International Calls	Competitive rates, includes international minutes
Data Plans	From low to high data options
Roaming	Free EU roaming
Special Offers	Student discounts and family plans

5.Tesco Mobile

Tesco Mobile provides an assortment of SIM-only deals that are strikingly competitive for all data requirements and budgets throughout the United Kingdom. Their plans are also structured on a rolling 30-day basis so you can pay monthly without being locked for long periods.

For instance, the “UK Plan Smart” comes with 5GB of data, unlimited UK calls and texts, and 100 international minutes for only £5 a month. The “National Plus” plan also provides 20GB of data and starts at £5 for the first month and then shifts to £10 monthly after that.

All plans are made available with EU roaming and 5G at no extra charge. Moreover, Tesco Mobile has special promotions such as £3 students per month for 15GB and family plans starting from £20 for 30 days. As there are no credit checks and the ability to cancel anytime, Tesco Mobile serves good value in the budget domain for flexible plans.

Feature	Details
Network Coverage	Uses O2’s 4G & 5G network
Flexible Plans	Rolling monthly plans
Clubcard Rewards	Earn Tesco Clubcard points with usage
Data Options	Multiple data packages
Roaming	Free EU roaming
No Credit Checks	Easy sign-up

6.Sky Mobile

Sky mobile provides flexibility with some of the best SIM only deals in the UK. It offers good value for money with its unique features. The company offers 12-month contracts that include calls and texts with data ranging from 3GB to unlimited. This is all offered on O2’s 5G network.

The company also provides a unique feature known as ”Piggybank’ where unused data can rol lover for up t three years and is shareable with family. This is in addition to being used later.

The 40GB plan costs £12/month while the 100GB plan is offered at £18/month. Sky mobile also sells loyalty to Skytv customers because they can now stream Skytv apps for free without consuming data. They can change plans and do not face surge in pricing which makes the deals beneficial.

Feature	Details
Network Coverage	O2 4G & 5G network
Data Rollover	Unused data rolls over for up to 3 years
Piggybank	Share data with family or save for later
Flexible Contracts	12-month contracts with no price hikes
Perks	Unlimited Sky app streaming for Sky TV customers
Data Plans	3GB to unlimited

7.Honest Mobile

Honest Mobile takes a new approach to SIM-only deals in the UK by striking a balance between competitive offer pricing and environmental sustainability.

They provide plans with inclusive UK calls and texts for £6.75/month for 4GB of data, £8.75/month for 10GB, and £12.50/month for unlimited data.

One of their best features is the loyalty discount that lowers your bill by 5% annually, up to a 30% maximum. Furthermore, Honest Mobile provides 5 days of free EU roaming per trip, unlimited UK tethering, and WiFi calling.

With Three’s 5G network, customers also get access to reliable and fast services throughout the UK. Eco-friendly users will appreciate that Honest Mobile is a carbon negative network, taking the green initiative of offsetting emissions and planting trees as part of their network’s footprint.

For mobile users looking for value, sustainability, and ease-of-use policy, Honest Mobile offers flexible 30-day or 12–month contracts with clear pricing and no hidden fees.

Feature	Details
Network Coverage	Three 5G network
Pricing	Bills reduce by 5% each year (up to 30%)
Plans	4GB, 10GB, unlimited data
Roaming	5 days free EU roaming per trip
Hotspot Use	Unlimited UK hotspot usage
Sustainability	Carbon-negative network, offsets emissions

8.SMARTY

Focused on value and flexibility, SMARTY provides some of the most affordable SIM-only plans in the United Kingdom.

Customers using SMARTY enjoy 4G and 5G network access through Three’s infrastructure. SMARTY deals offer contract-free plans which means there are no changes to fees for cancelling or altering plans.

One of their most popular services is the data discount program: you will get £1 back per GB of data not used on your next bill, this means paying for utilized services only.

They offer plans starting from £5 for 10GB of data up to £16 for unlimited data. Furthermore, they do not perform credit checks, allow EU roaming and tethering, and unhindered tethering and all these make SMARTY an ideal option for users on a budget.

Feature	Details
Network Coverage	Three 4G & 5G network
Data Discount	£1 cashback per unused GB
Plans	From 10GB to unlimited
Contract	No contract, cancel anytime
Roaming	Free EU roaming
Tethering	Unrestricted hotspot use

9.iD Mobile

iD Mobile is one of the most affordable providers in the UK when it comes to sim-only contracts. Their plans are very flexible, year-on-year price increases are nonexistent, and they offer good value for money.

iD’s mobile contracts run on the Three 5G network which guarantees high positive reviews for their data services, network coverage, and speed. For 6 pounds a month, customers get 20GB of data, unlimited minutes, and unlimited texts on a monthly contract.

There’s also a 110GB plan available for £10 a month on a one-month contract for those who require additional data. All plans feature no roaming fees in over 50 countries, data rollover, and bill capping which help manage potential expenditure.

Even with ido’s most basic plans, the mobile operator offers flexibility, cost-efficiency, and caters to both light and heavy mobile users. No price hikes during contracts and consistent networks further advance iD’s position as the best sim-only plan provider in the UK.

Feature	Details
Network Coverage	Three 5G network
Price Guarantee	No annual price rises
Plans	From 20GB to 110GB data
Contract	Monthly rolling contracts
Roaming	Free roaming in 50+ countries
Data Rollover	Allows rollover of unused data

10.Giffgaff

Giffgaff is known to have some of the cheapest SIM only deals for budget users in the UK, as one is able to get value without needing to subscribe to long-term contracts. Giffgaff operates using O2’s 5g network meaning that they have good coverage as well as fast data speeds.

Their plans do not come with contracts, hence customers can change or cancel anytime. For example, the £6/month comes with 2GB of data, unlimited call and texts in the UK and 5G.

Those who need more data can get the £10/month plan which offers 20GB or the £15/month plan which offers 35GB of data. EU roaming is included in all plans and there is no price increase for mid contract downgrading.

Moreover, Giffgaff has this unique ‘Always On’ plan for £25 a month that comes with unlimited data but 80 GB running at full data speeds, then capped at lower speeds during peak time. The ability to switch plans every month without undergoing a credit check makes Giffgaff the best choice for users looking to save money.

Feature	Details
Network Coverage	O2 4G & 5G network
Plan Flexibility	Pay monthly, cancel anytime
Plans	2GB to unlimited data (with speed restrictions)
Roaming	Free EU roaming
Unique Plan	“Always On” unlimited data with speed limits
Community Support	Community-driven customer support

Conclusion

In Conclusion: If you are on the lookout for the best SIM-only deals in the UK, remember that each mobile provider excels in different services: Sperate offers reliability with bonuses on Vodafone and Sky Mobile; VOXI and Giffgaff superb flexibility

Lebara and Lycamobile fantastic international calling; eco-friendly customers are swayed by Honest Mobile; SMARTY and iD Mobile are valued for cheap prices with high data allowances. Pick the one that is the best fit from the perspective of coverage, budget, and additional perks.

FAQ