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The honest framing
The 5G FWA versus fibre debate is not one comparison. It is several, depending on which fibre technology you are comparing against and what your actual options are at your specific address.
Full-fibre (FTTP) from a major provider, reliably delivering 900 Mbps symmetric on a shared but uncongested network, is a better connection than typical 5G FWA on mid-band spectrum. It has lower latency, more consistent throughput, and is not affected by cellular network congestion.
But FTTC broadband – the majority of UK residential connections as recently as 2024 – with actual speeds of 30-60 Mbps over ageing copper, is often demonstrably worse than 5G FWA. The theoretical comparison (“fibre is faster”) does not apply to the copper-last-mile reality of FTTC.
Speed comparison
| Technology | Typical UK speeds | Peak possible |
|---|---|---|
| FTTC (VDSL2) | 20-60 Mbps down / 5-15 Mbps up | 80 Mbps / 20 Mbps |
| Full-fibre (FTTP) | 100-900 Mbps symmetric | 1-10 Gbps |
| 5G FWA (indoor CPE) | 50-200 Mbps down / 20-50 Mbps up | 400 Mbps+ |
| 5G FWA (outdoor CPE) | 100-500 Mbps down / 30-100 Mbps up | 1 Gbps+ |
Upload speed is where 5G FWA often underperforms full-fibre. Most 5G deployments are asymmetric, with more capacity allocated to download. For most households this is not an issue. For video conferencing, large file uploads, or remote backup, it is worth checking operator uplink performance in your area.
Reliability and latency
Full-fibre has a structural advantage in reliability. A physical fibre connection is not affected by radio interference, network congestion from other cellular users, or weather conditions that affect radio propagation. When it works, it is highly consistent.
5G FWA performance varies more. Congestion at peak times on a busy cell site will reduce throughput for all FWA users on that site. Severe weather can marginally affect signal quality. And if your coverage is marginal to begin with, your connection will be less stable.
Latency on full-fibre is typically 5-15 ms round trip to a UK server. 5G SA latency is similar: 10-20 ms in normal conditions. 5G NSA latency is somewhat higher due to core network routing. For most broadband use cases including video calls and gaming, both are adequate. The latency difference matters more for real-time industrial or financial applications.
Installation and lead time
This is where 5G FWA has a clear practical advantage. A full-fibre installation requires an Openreach or AltNet engineer visit, physical cabling work that may involve drilling, and for properties without an existing connection, potentially weeks to months of lead time. Complex installs involving ducting or wayleave permissions can take longer still.
A 5G FWA install is same-day. Order a router and SIM card, receive them next day, plug them in or fit an outdoor unit in an afternoon. If you need connectivity immediately, there is no competition.
Cost
Full-fibre monthly costs have fallen significantly as competition has increased. Entry-level FTTP is available from around £20-25/month from smaller providers. Mid-tier gigabit packages from major providers run £30-50/month. There is often an upfront hardware cost and a minimum contract term of 12-24 months.
5G FWA data SIM cards for fixed use start from around £20-30/month for high-data plans. The CPE hardware is either purchased outright (£100-400 depending on the unit) or sometimes provided by operators on a contract. Month-to-month SIM-only arrangements are available, which suits temporary deployments or situations where you want flexibility.
For rural properties where full-fibre installation quotes include substantial contribution costs, 5G FWA is often significantly cheaper total cost of ownership.
Which to choose
Choose full-fibre if: it is available at your address, you need guaranteed consistent speed for high-demand use, you have a symmetric upload requirement, and you are comfortable with a contract commitment.
Choose 5G FWA if: full-fibre is not available or has a long lead time, you need to be online quickly, you want flexibility without a long-term commitment, you are in a rural area with good low-band 5G coverage, or you need a failover path alongside your primary connection.
The real answer for many properties is to start with 5G FWA and switch to fibre when it reaches you – or to run both as primary and failover.