Business SIM-Only Deals: Compare UK Network Prices in 2026

What Is a Business SIM-Only Deal?

A business SIM-only deal is a mobile contract that provides a SIM card with a data, calls and texts allowance without including a handset. You supply the phones yourselves — either devices already owned by the business, hardware purchased separately or staff's personal devices on a BYOD (Bring Your Own Device) policy. SIM-only contracts are typically shorter than full handset contracts (30 days to 12 months is common, though 24-month terms are available) and cost significantly less per line per month.

For businesses that already have a device fleet or that operate a BYOD policy, SIM-only is the most cost-efficient way to provide mobile connectivity to staff.

Why Business SIM Contracts Differ from Consumer SIM Deals

Business SIM contracts sold through the business channels of UK networks differ from consumer deals in several important ways:

• Consolidated billing: Multiple SIMs billed on a single monthly invoice with VAT receipts, making accounting straightforward
• Account management: Business accounts with 5+ SIMs typically have a named account manager
• Data sharing: Many business plans allow unused data to be pooled or shared across the account
• Priority customer service: Separate business customer service lines with faster response times
• MDM compatibility: Business plans are compatible with Mobile Device Management platforms used to enforce security policies on corporate SIMs
• Roaming terms: Business accounts often have better-negotiated EU and international roaming terms than consumer plans

UK Networks Compared: Business SIM-Only Plans

The UK has four main mobile network operators: EE, O2, Vodafone and Three. Pricing changes frequently and the rates below are indicative ranges for 2026 — always request a current quote for your account size before making a decision.

EE Business SIM-Only

EE operates the UK's largest 4G and 5G network by geographic coverage. Business SIM plans typically range from approximately £12–£16/month for essential data allowances (2–10 GB) up to £28–£40/month for unlimited plans. EE is generally the most expensive of the four networks but justifies this with consistently strong coverage metrics.

• Coverage: Best in class for rural and suburban UK
• 5G: Available on mid and upper tiers in major UK cities
• Data pooling: Available on business accounts
• Best for: Teams operating across diverse UK locations, including rural areas

O2 Business SIM-Only

O2 Business is one of the most active in the UK business mobile market and offers competitive pricing for fleets of 5+ SIMs. Plans typically range from approximately £10–£14/month for limited data up to £22–£32/month for unlimited. O2's Priority programme and business-specific services add value for certain client profiles.

• Coverage: Strong in urban and suburban areas; can lag EE in rural locations
• 5G: Available across most major UK cities
• Data pooling: Available, with flexible shared allowance options
• Best for: Office-based teams, competitive pricing for mid-size fleets

Vodafone Business SIM-Only

Vodafone Business is well-regarded for international roaming and for businesses with overseas travel requirements. UK pricing is competitive with O2. Plans typically range from approximately £11–£15/month for core data tiers up to £25–£35/month for unlimited. The pending Vodafone–Three merger may affect future pricing and product structure.

• Coverage: Strong in cities; broadly comparable to O2 nationally
• 5G: Widely available; Vodafone was among the first to launch UK 5G
• International roaming: More comprehensive roaming options than some competitors
• Best for: Businesses with staff travelling internationally

Three Business SIM-Only

Three typically offers the most competitive pricing for unlimited data plans. Business unlimited SIM plans are commonly available at £15–£22/month. Coverage is the trade-off — Three's network is weaker than EE and O2 in suburban and rural areas, though the ongoing integration with Vodafone is gradually improving this.

• Coverage: Good in major cities; weaker outside urban areas
• 5G: Available in major cities
• Unlimited data: Most cost-competitive unlimited pricing of the four networks
• Best for: City-based teams with high data usage and cost sensitivity

What to Look for When Comparing Business SIM Deals

True Coverage at Your Locations

Published coverage maps show theoretical coverage. For business-critical connections, test signal strength at your office locations and at addresses where mobile staff spend most of their time. Ofcom's Connected Nations reports and individual network coverage checkers by postcode are useful starting points.

Data Pooling vs Per-SIM Allowances

Data pooling allows a team's total allowance to be shared — so a staff member who uses 15 GB this month can draw on the unused allowance of colleagues who only used 3 GB. For teams with variable usage patterns, pooled plans typically result in lower monthly costs than per-SIM plans where lightly-used SIMs waste their allowance.

Speed Management on Unlimited Plans

Not all unlimited plans are equal. Some networks apply speed throttling after a daily or monthly threshold, or de-prioritise traffic during peak network hours. Read the fair usage policy before signing — particularly important if staff are using mobile data for video calls or large file transfers.

Contract Length and Mid-Term Flexibility

Business SIM contracts are available on 30-day rolling, 12-month and 24-month terms. Longer terms attract lower monthly pricing but reduce flexibility. For a growing business, consider whether a 12-month term with a price review at renewal is preferable to a 24-month commitment even if the upfront rate is slightly higher.

International Roaming

Post-Brexit, EU roaming is no longer automatically included on UK mobile contracts. Check each network's current EU roaming policy and daily roaming charges if staff travel to Europe. For businesses with significant international travel, negotiate a dedicated roaming bolt-on at the outset.

How Business Mobile Brokers Can Help

As with most business telecoms purchases, the pricing available through a business mobile broker is typically better than retail tariff rates from the network directly. Brokers hold volume commercial agreements with multiple networks, compare live pricing simultaneously and are remunerated by the network — so the service costs the business nothing extra. For accounts with 5 or more SIMs, using an independent broker is the most efficient route to market.

AMVIA manages business mobile contracts across all four UK networks and can compare current pricing for your account size and coverage requirements.