Resources

Read up.
Get connected.

Guides, articles and answers to help you get the most from Fuse — and from the four UK networks underneath.

Read this first

Roaming SIM UK: One SIM, 120+ Countries

A roaming SIM UK gives you data at home and abroad on one plan — no daily fees, no second SIM. Here's how it works and how Fuse covers 120+ countries.

Read article

Guides

Step-by-step help for setup, switching and troubleshooting.

All guides

GuideTroubleshooting·8 min read

eSIM Not Activating? Fix Common Issues

eSIM not activating in the UK? Fix 'activation failed', No Service, greyed-out settings and APN errors on iPhone, Samsung Galaxy and Google Pixel.

GuideSetup·7 min read

Transfer Your Number to an eSIM UK

You won't lose your number switching to an eSIM. Learn how to transfer via PAC code or in-app — covering same-network, new provider, and dual SIM paths.

GuideTechnology·8 min read

eSIM Compatible Phones UK: 2026 List

Find out which phones support eSIM in the UK in 2026 — with a full list by brand, a quick compatibility checker, and guidance on carrier-locked devices.

Blog

News, insights and analysis from the Fuse team.

All posts

BlogRoaming·6 min read

Roaming SIM UK: One SIM, 120+ Countries

A roaming SIM UK gives you data at home and abroad on one plan — no daily fees, no second SIM. Here's how it works and how Fuse covers 120+ countries.

BlogSavings·6 min read