JT 5G


Say hello to better connectivity

We're building a faster, smarter and more capable mobile network for the Channel Islands, designed to keep you connected wherever life takes you.

Upgrade to JT 5G for faster speeds, greater reliability and future-ready connectivity.



Life without buffering

Better today, ready for tomorrow

A new JT 5G SIM or eSIM gives you access to:

Making calls in buildings with poor signal with Wi-Fi Calling
Faster, more reliable everyday use
Upcoming network enhancements
The next generation of JT mobile experiences

Wi-Fi Calling is here

Make and receive calls over Wi-Fi when indoor mobile coverage is limited.

Whether you're at home, at work or on the move, it's another way JT helps keep you connected.

hello

The Islands' Most Advanced Mobile Network

We're investing in the future of mobile connectivity across the Channel Islands.

While other networks still rely on older technology, JT is building a future-ready network designed to unlock the full potential of 5G.

Ready for what's next?

Upgrade to a JT 5G SIM or eSIM today and be ready for the future of connectivity.

Frequently Asked Questions

Does my current device support 5G?
Check here to see if your current device is compatible. If it isn’t and you’d like to upgrade, you can spread the cost of a new 5G compatible smartphone over a period of up to 36 months. Browse our latest range.
What’s the difference between 5G stand-alone and 5G non stand-alone?
5G comes in two forms: Non‑Standalone (NSA) and Standalone (SA). NSA is the version most widely deployed today and builds on existing 4G infrastructure, delivering faster speeds but relying on older technology behind the scenes. In contrast, SA is a fully dedicated 5G network with its own core, unlocking the full potential of 5G, such as ultra‑low latency, greater capacity, and more reliable performance. In simple terms, NSA is a step up from 4G, while SA is “true” 5G designed to support the next generation of connected experiences. Find out more from our CTO, Alessando.
When will I have access to 5G SA?
The good news is that 5G Standalone (SA) is now live in Jersey and is currently being rolled out in Guernsey, with VoWi-Fi being available from 1st July 2026. However, access to it can depend on a few factors, including whether your handset supports 5G SA and if your device manufacturer has enabled it through software updates. You’ll also need a new SIM to activate SA - this can be arranged when you next upgrade your phone or by visiting a JT shop.
Why does my phone sometimes switch between 4G and 5G?
5G NSA still uses 4G technology, so your device will combine both networks for best performance and switch to the strongest signal.
Will 5G SA be available everywhere?
Yes, 5G Standalone (SA) will be available to JT customers across the whole of Jersey and the Bailiwick of Guernsey as the rollout completes. To access it, you’ll need a compatible device and a new SIM from us. Once you have both, you’ll be ready to enjoy the full benefits of 5G SA as coverage continues to expand. Click here for more information about our 5G rollout.
What is Voice over Wi-Fi (or Wi-Fi Calling)?
Voice over Wi-Fi (VoWi-Fi) lets you make and receive calls and SMS over a Wi-Fi connection instead of relying on a mobile signal. This is especially useful in areas with weak or no indoor coverage, as it helps keep your calls clear and connected wherever you have Wi-Fi access— whether that’s at home, work, or in a cafe. Most modern smartphones support VoWi-Fi, but you may need to enable it in your device settings and ensure your handset is compatible.
Does VoWi-Fi (Wi-Fi Calling) and 5G SA cost extra?
No - VoWi-Fi (Wi‑Fi Calling) and 5G Standalone (SA) don’t cost any extra. They’re included in all our mobile plans at no additional charge. As long as your phone is compatible and you have a new SIM from us, you’re ready to go. For VoWi-Fi, you’ll also need a broadband connection to make calls over Wi-Fi.
Can I use VoWi-Fi (WiFi Calling) abroad?
Wi-Fi Calling (VoWi-Fi) is designed to work on Wi-Fi networks within the Channel Islands, so it won’t be available when you’re using Wi-Fi abroad.
Once activated, will calls switch between Wi-Fi and the mobile network?
Yes - your phone can seamlessly switch between VoWi-Fi and the mobile network during a call, always using the strongest available connection.
Can I call emergency services using Wi-Fi Calling?
Yes, you can still contact emergency services using Wi-Fi Calling.
Does Wi-Fi Calling use my data allowance?
No, Wi-Fi Calling uses your Wi-Fi connection, so it won’t use your mobile data allowance.
Which devices support Wi-Fi Calling?
Most modern smartphones support Wi-Fi Calling, including recent Apple iPhones and Android devices from major manufacturers. Check out our device table to see when its likely to be available for your device.
Do I need to do anything else to use Wi-Fi Calling?
It’s simple. All you need is a new SIM or eSIM and just make sure your device is compatible, Wi-Fi Calling is switched on in your settings, and you’re connected to Wi-Fi. Then you can call and text as normal.