250 MB
UK 4-network
£1.20a month per active SIM, ex VAT
Order 250 MBMulti-network SIM cards for UK devices
What a multi-network IoT SIM is, when using all four UK networks matters, and how ThingSIM's 4-network and 3-network SIMs compare on price.
A multi-network SIM is not tied to one mobile operator. It can connect to more than one UK network and uses whichever gives the best signal where the device is. A standard SIM can only use its own network, so a device installed where that network is weak has a weak connection, however good the others are.
Every ThingSIM UK SIM is multi-network. Choose UK 4-network to roam across O2, Vodafone, Three and EE, or UK 3-network to roam across O2, Vodafone and Three for less.
Multi-network SIM prices
| UK 4-network | UK 3-network | |
|---|---|---|
| Networks | O2, Vodafone, Three and EE | O2, Vodafone and Three |
| 50 MB a month | £0.90 | £0.65 |
| 250 MB a month | £1.20 | £1.15 |
| 1 GB a month | £2.40 | £2.25 |
| 5 GB a month | £8.85 | £8.20 |
Prices are per active SIM per month, ex VAT. Each SIM costs £2.00 once, as a physical trio SIM (mini, micro and nano) or an eSIM. There is no contract, and a SIM is billed only from the day you switch it on.
Why multi-network matters for a device
A phone moves with its owner, who walks to the window when the signal drops. A device stays where it was fixed: an alarm panel in a cupboard, a camera on a pole, a charger in an underground car park. It lives with whatever signal reaches that spot.
With a multi-network SIM, that spot only needs good coverage from one of the networks the SIM can use, not from one network chosen in advance. If that network has a problem, the SIM can move to another.
4-network or 3-network?
Choose UK 4-network for devices that move (trackers, vans, traffic management kit), devices that must not miss a message (alarms, payment terminals, failover routers), and anywhere you haven't checked the signal. EE matters most in rural areas and inside buildings, where it is sometimes the only strong signal.
Choose UK 3-network for devices in a fixed place where you know O2, Vodafone or Three is strong, such as meters, loggers and sensors in towns. It costs less at every size, and nothing else changes. The 4-network vs 3-network guide goes into more detail, and will my device get a signal explains how to check a site.
What else comes with every SIM
- 4G data, LTE-M, NB-IoT and SMS
- A private IP address, with a static public IP for £8 a month if you need to reach the device
- No overage: a SIM pauses at its allowance, and you can upgrade it straight away or wait for the reset
- A portal to activate, pause, cease and change plans, plus an API
Common questions
What is a multi-network SIM?
A SIM that can connect to more than one mobile network and uses whichever is strongest where the device is. ThingSIM's UK 4-network SIM roams across O2, Vodafone, Three and EE; the 3-network SIM leaves out EE and costs less.
Is a multi-network SIM better than a single-network one?
For a device in a fixed place, usually. It can use whichever network is strongest where it is installed, rather than depending on one network's coverage at that spot.
Is there a multi-network eSIM?
Yes. Every ThingSIM is available as an eSIM delivered by QR code, at the same £2.00 as a physical SIM, on the same plans. See IoT eSIM or physical SIM.
Is there a contract?
No. Pay monthly by card, or a year up front. Up to 25 SIMs can be ordered online; for more, talk to us.
Recommended plan
UK 4-network, 250 MB a month
Roams across all four UK networks and uses whichever is strongest where the device is.
Compare every plan