March 4, 2026

Business SIM Only Deals UK

What Is a Business SIM Only Deal?

A business SIM only deal provides a mobile plan — data, calls and texts — without a bundled handset. You receive a SIM card (or eSIM) that slots into a phone your business already owns, keeping monthly costs significantly lower than a traditional handset contract.

These plans are available on 12-month, 24-month or 30-day rolling terms from every major UK network. Because there is no device subsidy baked into the price, business SIM only deals typically cost 40–60% less per month than equivalent contracts that include a phone.

At Connection Technologies, we compare SIM only plans from EE, O2, Vodafone, Three and specialist providers so you can find the right balance of data, cost and flexibility for every member of your team.

Benefits of Business SIM Only Plans

Switching to — or starting with — a SIM only business contract offers several clear advantages:

Significant Cost Savings

Without a handset to finance, monthly bills drop dramatically. A 20 GB SIM only plan might cost £10–£14 per month, compared with £30–£40 for a similar allowance on a handset contract. Multiply that saving across ten or twenty lines and the annual difference runs into thousands of pounds.

Greater Flexibility

Many business SIM only deals UK are available on 30-day rolling contracts, meaning you can scale up or down as your workforce changes. This is especially valuable for seasonal businesses, project-based teams, or startups where headcount fluctuates.

BYOD Compatibility

Bring-your-own-device policies are increasingly popular. Employees use a phone they are already comfortable with, and the business simply provides a SIM card. This removes the hassle of device procurement, setup and lifecycle management.

Faster Deployment

SIM cards can be dispatched and activated within 24 hours — there is no waiting for handset stock or delivery logistics. eSIM activation can be even faster, often completing within minutes.

Environmental Responsibility

Extending the life of existing handsets by pairing them with a SIM only plan reduces electronic waste. For businesses with sustainability targets, this is a straightforward win.

Best Business SIM Only Deals in 2026

The best business SIM only deals vary depending on how much data your team needs. Here is a breakdown by usage tier to help you find the right fit.

Light Users (1–5 GB)

Ideal for employees who spend most of their time on Wi-Fi and only need mobile data for email, messaging and occasional web browsing. Expect to pay between £6 and £10 per month. Both O2 and EE offer competitive plans in this bracket.

Medium Users (10–30 GB)

Suitable for sales reps, field workers and managers who use cloud apps, video calls and navigation on the move. Plans in this range cost £10–£18 per month. Vodafone’s 20 GB plan with inclusive EU roaming is a standout option for teams that travel within Europe.

Heavy Users (50–100 GB)

For staff who tether laptops, stream training videos, or run data-intensive applications in the field. Prices range from £18 to £25 per month. EE’s 5G-enabled plans offer the fastest speeds in this tier, which matters for large file uploads and video conferencing.

Unlimited Data

If you want to eliminate data management entirely, unlimited plans remove the risk of overage charges and the admin burden of monitoring usage. Three Business offers the most affordable unlimited SIM only deals for business from around £18 per month, while EE’s unlimited 5G plans start at approximately £25.

Not sure which tier your team needs? Request a free quote from Connection Technologies and we will analyse your current usage to recommend the most cost-effective option.

Business SIM Only vs Contract with Handset

Deciding between a business SIM only deal and a handset contract comes down to your hardware situation and financial preferences.

When SIM Only Makes Sense

Your team’s current handsets are in good condition and meet performance requirements.
You prefer to buy devices outright as a capital expense, keeping them on the balance sheet.
You want the lowest possible monthly recurring cost.
You need short-term or rolling contracts for flexibility.
You operate a BYOD policy where employees use personal devices.

When a Handset Contract Makes Sense

Multiple devices need replacing and you want to spread the cost over 24–36 months.
Cash flow is a priority — monthly payments are easier to manage than a large upfront purchase.
You want device insurance, warranty cover and next-day replacement included.
Your staff need the latest hardware for demanding applications.

Many businesses use a hybrid approach: handset contracts for roles that require new devices and SIM only plans for everyone else. Read our full guide to business phone contracts in 2026 for a deeper comparison.

Multi-SIM and Shared Data Plans for Teams

If you are equipping a team rather than an individual, multi-SIM and shared data plans can deliver better value than individual business SIM cards on separate allowances.

How Shared Data Works

A shared data plan allocates a single data pool across multiple SIM cards. If one employee uses 2 GB in a month and another uses 30 GB, they draw from the same pot — so you are not paying for unused data on the lighter user’s line.

When Shared Data Saves Money

Your team has a wide spread of data usage — some light, some heavy.
Usage patterns are unpredictable month to month.
You want a single, predictable monthly bill rather than variable per-line charges.

When Individual Plans Are Better

Usage is fairly uniform across the team.
You want to track and control each user’s consumption independently.
You need different contract terms for different employees (e.g. rolling for contractors, 12-month for permanent staff).

Vodafone and EE both offer robust shared data bundles for business. Connection Technologies can model both shared and individual scenarios to show you which saves more — get a free comparison quote.

How to Choose the Right Business SIM Only Deal

Use this checklist to find the best business SIM only deals for your company:

Audit data usage: Review itemised bills for the last three months. Identify each user’s average consumption and peak usage. This prevents over- or under-provisioning.
Check network coverage: Verify 4G and 5G coverage at every location your team works from — offices, warehouses, client sites and regular travel routes.
Decide on contract length: 12-month terms offer the best per-month rates. Rolling 30-day contracts cost slightly more but give maximum flexibility. Match the term to your business planning cycle.
Consider roaming needs: If staff travel internationally, check whether the plan includes EU roaming and what rates apply outside Europe.
Look for spend caps: Choose a provider that lets you set per-user spending limits and sends alerts before charges exceed a threshold.
Evaluate the management portal: A good online portal lets you add or remove SIMs, adjust allowances, and view real-time billing without calling support.
Ask about multi-line discounts: Most networks offer tiered pricing — the more lines you connect, the lower the per-line cost. Make sure you are getting the volume discount you deserve.
Compare across networks: Do not just check one provider. Use an independent broker like Connection Technologies to see side-by-side pricing from every major network.

Switching to a Business SIM Only Plan

Moving to a new business SIM only deal is straightforward, whether you are coming from another business plan or a consumer contract.

Request a PAC code: Text PAC to 65075 from each handset you want to port. You will receive a code valid for 30 days that lets you keep your existing number.
Choose your new plan: Compare business SIM only deals across all networks to find the best fit.
Provide the PAC to your new provider: They will schedule the number port, which typically completes within one working day.
Insert the new SIM: Once the port is complete, swap the SIM card (or activate the eSIM) and you are live on the new network.

If you want to cancel a line without keeping the number, request a STAC code instead by texting STAC to 65075. For a detailed walkthrough, visit our PAC code help page.

Early-termination fees: If you are still within a minimum contract term, your current provider may charge an exit fee covering the remaining months. Factor this into your cost comparison — in many cases, the savings on a new SIM only deal outweigh the termination charge within a few months.

Frequently Asked Questions

How much does a business SIM only deal cost?

Prices start from around £6 per month for a 1–5 GB plan and rise to £25–£30 for unlimited data. The exact cost depends on the network, data allowance and contract length. Multi-line discounts can reduce per-SIM costs further.

Can I use a business SIM only deal in any phone?

Yes, as long as the phone is unlocked or locked to the same network. Most handsets purchased outright or those that have completed their original contract are unlocked. If in doubt, contact your device manufacturer or previous network to confirm.

Do business SIM only deals include 5G?

Most business SIM only plans from EE, Vodafone and Three now include 5G access at no extra cost, provided your handset supports it and you are in a 5G coverage area. O2 also includes 5G on the majority of its business plans.

Can I get multiple business SIM cards on one account?

Absolutely. All major networks support multi-line business accounts. You can manage all SIMs from a single portal, receive one consolidated invoice, and benefit from volume discounts. Connection Technologies can set up multi-SIM accounts across any network.

What is the shortest business SIM only contract available?

The shortest option is a 30-day rolling contract, available from most networks. These can be cancelled with just 30 days’ notice, making them ideal for temporary staff, contractors, or businesses that need maximum flexibility. Monthly costs are slightly higher than 12-month fixed terms.

Get a Free Business SIM Only Quote

Ready to cut your mobile costs with a business SIM only deal? Connection Technologies compares plans from every major UK network — EE, O2, Vodafone, Three and more — to find the perfect match for your team’s data needs and budget.

Get your free business SIM only quote today. Our service is completely free and there is no obligation. We will present clear, side-by-side options so you can make an informed decision in minutes.

You can also browse our business mobiles page for handset options, read our guide to the best business mobile deals in 2026, or learn about business phone contracts if you are considering a plan with a new device.