APN stands for Access Point Name. It's a configuration setting that tells your phone how to reach your carrier's data network. Without the right APN your phone can connect to a tower for calls and SMS but won't get internet.
Where you'll see it
Settings → Mobile/Cellular → APN. Most carriers ship SIMs that auto-configure the APN — you'll never see it. But if you swap SIMs or import a phone, you may need to enter the APN manually.
Fuse APN
Fuse eSIMs configure the APN automatically when you scan the activation QR code. You shouldn't need to touch this setting.
When manual setup is needed
- Imported phone from another country
- Older devices without auto-config
- Some carrier-locked devices when switching providers
See also
How APN matters when picking a UK mobile plan
Understanding APN 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 APN 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.