5G is the current generation of mobile network technology, rolled out across the UK from 2019. It offers much faster peak speeds (1 Gbps+ in ideal conditions) and lower latency (under 10ms) than 4G LTE.
Real-world speeds in the UK
Typical 5G in a strong-signal area: 200-500 Mbps download. 4G LTE on the same network: 30-100 Mbps. The gap is biggest in cities with lots of 5G spectrum deployed; in rural areas the two are often closer.
5G flavours
- 5G NSA (Non-Standalone): runs on top of existing 4G core — most current UK deployment
- 5G SA (Standalone): pure 5G end-to-end — rolling out 2025-2027 across UK networks
Phones that need 5G
You need a 5G-capable phone (iPhone 12+, Galaxy S20+, Pixel 5+). 4G phones still work on Fuse — just at 4G speeds.
See also
How 5G matters when picking a UK mobile plan
Understanding 5G helps you compare mobile providers on a like-for-like basis. Most consumer mobile pricing pages skip the technical detail — knowing the terminology means you can spot when a plan is genuinely better and when it just sounds that way. The Fuse Mobile glossary keeps definitions short and consumer-focused, no jargon-on-jargon.
Fuse Mobile is a UK multi-network data-only eSIM — it gives your phone access to all four UK mobile networks (EE, Three, Vodafone, O2) through a single profile. Where 5G is relevant to that setup, it's surfaced explicitly: pricing pages show real numbers, the coverage checker shows live per-network signal, and there's no hidden fee structure. See the plans page for the current pricing or read the multi-network eSIM explainer for the technical detail.