UK FMC Providers Compared: Gamma, Vodafone, IQ Mobile & More
No independent FMC comparison exists — until now. We've analysed every major UK FMC provider on network, PBX compatibility, pricing, and flexibility so you can make an informed decision.
The Short Version
The UK FMC market has six main providers, each with distinct strengths and trade-offs. The biggest differentiator isn't price — it's PBX lock-in. Most providers tie their FMC product to a specific phone system, meaning switching later is painful and expensive.
IQ Mobile is the only FMC provider that is fully PBX-agnostic — our SIMs work with any phone system (Asterisk, Broadsoft, 3CX, FreeSWITCH, and more). Combined with EE network coverage, flexible contracts, and competitive pricing from £15/month, it's the most versatile FMC option in the UK market.
That said, if you're already committed to a specific PBX vendor and happy to stay, their integrated FMC product may offer a simpler setup. This comparison helps you decide.
3 Key Takeaways
PBX Lock-in Is the Biggest Risk
Most FMC providers tie you to their own PBX. Gamma requires Horizon, Vodafone requires their PBX, BT requires theirs. IQ Mobile is the only provider that works with any phone system — switch PBX without losing FMC.
Network Coverage Varies Widely
EE has the UK's largest 4G/5G network (99% population coverage). Gamma Connect runs on Three, which has a smaller footprint. For mobile workers across the UK, network choice matters more than you think.
Price Gap Is Significant
FMC pricing ranges from £15/month (IQ Mobile) to £35/month+ (Vodafone, BT). Over 100 users, that's up to £24,000/year difference — and most premium-priced providers still lock you into their PBX.
UK FMC Providers: Side-by-Side Comparison
How the major UK FMC providers compare on key factors
| Feature | IQ Mobile | Gamma Connect | Vodafone One Net | BT One Phone | Enreach | NFON |
|---|---|---|---|---|---|---|
| Network | EE | Three | Vodafone | EE | Partner network | Various |
| PBX Lock-in | No — PBX agnostic | Horizon only | Vodafone PBX | BT Cloud PBX | Enreach Contact | NFON PBX |
| Native Dialler | ||||||
| eSIM Support | TBC | TBC | ||||
| Starting Price | From £15/mo | ~£25/mo+ | ~£35/mo | ~£35/mo | Add-on pricing | Contact for price |
| Contract Flexibility | Flexible | Via partner | 24-month | 24-month | Via partner | Via partner |
| Partner/Reseller Model | ||||||
| White Label Available |
Provider Breakdown
IQ Mobile FMC
IQ Mobile provides FMC SIMs on the EE network — the UK's largest mobile network with 99% population coverage. The key differentiator is PBX agnosticism: IQ Mobile FMC works with any phone system including Asterisk, Broadsoft, 3CX, FreeSWITCH, and Fusion. This means you're never locked into a specific PBX vendor.
Pricing starts from £15/month per user with flexible contracts — no 24-month lock-ins. IQ Mobile also offers a partner/reseller model with white-label SIM printing, making it the go-to choice for telecoms resellers who want to offer FMC under their own brand.
Gamma Connect
Gamma Connect is one of the more established FMC products in the UK channel. It runs on the Three network and provides native dialler integration with eSIM support. However, it's tightly coupled to Gamma's Horizon hosted PBX platform — you can only use Gamma Connect if you're on Horizon.
This PBX lock-in is the main limitation. If you decide to move away from Horizon in the future, you lose your FMC capability. Pricing is typically around £25/month or more per user, sold through Gamma's partner channel.
Vodafone One Net
Vodafone One Net integrates mobile and fixed calling on the Vodafone network. It's a full unified communications solution that includes native dialler FMC alongside desk phones and softphone apps. The product is mature and well-supported for enterprise customers.
The trade-offs: Vodafone One Net requires Vodafone's own PBX platform, pricing starts around £35/month, and contracts are typically 24 months. Annual price increases of approximately £2.08/month are applied in line with CPI. Best suited for organisations already committed to the Vodafone ecosystem.
BT One Phone
BT One Phone runs on the EE network (BT owns EE), offering strong UK coverage. It provides native dialler FMC integrated with BT's cloud voice PBX. The product is positioned at enterprise level with comprehensive support and management tools.
Like Vodafone One Net, BT One Phone locks you into BT's phone system. Pricing starts around £35/month with 24-month contracts. The enterprise focus means it's typically sold to larger organisations, and smaller businesses may find the pricing and contract terms prohibitive.
Enreach Contact Anywhere
Enreach (formerly Swyx/Centile) offers Contact Anywhere, an FMC add-on that works with their Enreach Contact unified communications platform. It provides native dialler integration with eSIM support via QR code provisioning, making deployment straightforward.
Enreach operates through a partner network and supports a reseller model. The FMC component is an add-on to the core Enreach Contact platform rather than a standalone product, which means you need the full Enreach stack. Pricing is typically per-user as an add-on to your existing Enreach contract.
NFON FMC
NFON is a European cloud PBX provider that offers FMC as part of their Cloudya platform. The FMC component provides native dialler integration with eSIM support, working across various mobile networks depending on the deployment.
NFON's UK presence is growing but still smaller than established players like Gamma or BT. Like other PBX vendors offering FMC, the native dialler feature is tied to the NFON Cloudya platform. Pricing is available on request through their partner network.
Why IQ Mobile?
IQ Mobile is the only UK FMC provider that combines EE network coverage, PBX agnosticism, flexible contracts, and competitive pricing. Here's what that means in practice:
No PBX lock-in
Works with any phone system — switch PBX without losing FMC
EE network
UK's largest 4G/5G network — 99% population coverage
From £15/month
Most competitive FMC pricing in the UK market
Partner-friendly
White-label SIMs, own billing, full reseller model
Flexible contracts
No 24-month lock-ins — scale up or down as needed
eSIM ready
Physical SIM and eSIM support for modern devices
FMC Provider Comparison: FAQ
Common questions about choosing an FMC provider in the UK