IoT SIM vs normal phone SIM for a device

Choosing a SIM Published

Why a router, camera or tracker is better served by an IoT data SIM than a phone SIM, and what actually differs between the two in Ireland.

A phone SIM will often work in a router or a camera, at least for a while. The trouble starts later: terms that do not allow it, a SIM tied to one network, a contract for something that sits in a drawer, and a device that stops working the day a bundle runs out. An IoT SIM card, sometimes called an M2M SIM or a data SIM for business, is built for the job a device actually does.

What a phone SIM is designed for

A consumer SIM assumes a person with a phone. Its price assumes a handset, its allowance assumes a person's browsing, and its terms often limit or forbid use in routers and other devices. It is locked to one network, so a device in a spot where that network is weak simply has a weak connection. And it is billed every month whether the SIM is used or not.

None of that matters for a phone. All of it matters for a camera on a building site, a card machine at a market, or a tracker in a van.

What an IoT SIM card does differently

Phone SIM ThingSIM IoT SIM
Networks One Roams across Vodafone, Three and eir
Billing Every month from purchase From activation, or 30 days after despatch; no contract
At the allowance Throttled, cut off or overage Pauses; upgrade or wait for the reset
Contract Often 12 to 24 months None; billed monthly
Device use Often limited by the terms What it is for
Remote management None Portal and API

The multi-network part is the one most people underestimate. A ThingSIM Ireland multi-network SIM uses whichever network is strongest where the device is, so a camera on the edge of one network's coverage, on a farm in the West or a site in the Midlands, is not stuck with it.

Paying for SIMs in use

SIMs arrive inactive and cost €2.49 each, once. Billing starts when you activate, or automatically 30 days after we despatch your SIM (30 days after it is issued, for an eSIM); we email you at least 5 days before. When a device is retired, cease its SIM and the charge stops. See how ThingSIM billing works for the detail.

Sizing it properly

Most devices use far less data than a phone. A card machine or alarm communicator often fits comfortably in 50 MB a month; a router or a camera that uploads video needs much more. The data guide works through the common devices. Plans run from 50 MB at €0.99 a month on the Ireland multi-network plan to 5 GB at €8.99.

When a phone SIM is fine

For a one-off test on your desk, a spare phone SIM is a quick way to check a device connects. For anything installed and left to run, use a SIM designed for it.

Common questions

Can I put a ThingSIM SIM in a 4G router?

Yes. That is one of the main things it is for. The APN for each SIM is shown against it in the ThingSIM portal; see setting the APN.

Does a ThingSIM SIM do SMS?

Yes. SMS is supported, which matters for trackers and alarm communicators that are configured or report by text.

What happens if my device uses more data than I expected?

The SIM pauses at its allowance instead of running up a bill. You can move it to a larger plan straight away, paying only the difference for the rest of the month, or wait for the allowance to reset.