V3 SIM Launched: Now Supports Roaming in 170+ Countries πŸŽ‰
Guides & resources

How any of this actually works

Mobile coverage is explained badly almost everywhere, usually by people selling something. These are the guides we’d want to read ourselves β€” including the ones where the answer isn’t us.

From the blog

Setup instructions, APN settings and troubleshooting β€” kept current by our support team.

Still not sure what you need?

Tell us the problem — bad signal at home, a router in a van, a month abroad — and we'll point you at the right plan, or tell you that you don't need one.

All four UK networks on one SIM. EE, O2, Vodafone and Three, switching automatically to whichever has the strongest signal.

EEO2VodafoneThree

Get in touch

[email protected]

© 2021–2026 FlexiFone Telecommunications Limited. The use of the EE, O2, Vodafone and Three branding on this website is for informational purposes only and does not imply any endorsement or affiliation with our Multi-Network SIM product line. All trademarks and registered trademarks are the property of their respective owners.

Unbeatable coverage

1. Which FlexiFone SIM do you have?

2. Find your destination

Get Started


Get Started


You can Port-In your number after activating your SIM. You can also Allow/Block a specific UK network.

or Download our App to get started

Get Started


Download Our App to get Started!


Download our iOS app, select a plan and setup the eSIM on your iPhone through the app within 60 seconds!Β 

We would be launching web-based signup (for Physical-SIM and Android users) on 14/02/2025.

Join the Waitlist - Launching on 14/02/2025