Not every device needs to make phone calls. Yet many people pay for full mobile plans on tablets and hotspots that only ever use data. Choosing between a data-only SIM and a full plan is one of the easiest ways to stop overpaying. Here’s how to decide.
The simple difference
A full mobile plan includes calls, texts and data — everything your main phone needs. A data-only plan includes just the data. No call minutes, no SMS bundle, only connectivity. For any device that you don’t make calls from, paying for calling is money wasted.
When data-only is the smart choice
Data-only plans shine on secondary and connected devices:
- Tablets: browse, stream and work on the go without Wi-Fi.
- Mobile hotspots: a portable router for your laptop or for the family on a trip.
- Smartwatches and trackers: light, steady data without a calling plan.
- Laptops with SIM slots: always-on internet for remote work.
- Second phones: a work or travel handset that uses messaging apps over data.
In all of these, calls and texts happen through apps or your main phone — so a leaner, cheaper data-only plan is the better fit.
When a full plan makes sense
Your primary phone is the obvious case for a full plan. You want reliable calls and SMS (including those all-important two-factor codes) plus generous data. For most people, that’s a single full plan on the main phone and data-only SIMs on everything else. You can mix and match on our plans page to suit your devices.
How much data should a data-only plan have?
It depends entirely on the device’s job:
- Light tablet use (browsing, email, maps): a small monthly bundle.
- Streaming on a tablet: a mid-size or larger plan.
- Hotspot for a laptop: size it like a home connection — bigger is safer.
- Smartwatch: the smallest plan available is usually plenty.
Check the device’s data history if it has been on Wi-Fi only — it gives you a realistic starting point.
Don’t forget travel for your second devices
Tablets and hotspots travel too. Rather than roaming, drop a travel eSIM onto an eSIM-capable tablet for your trip. A regional Europe eSIM keeps a tablet online across a multi-country holiday, while a single-country plan for somewhere like Thailand or Spain covers a focused trip cheaply. A hotspot loaded with a local plan can even keep the whole family’s devices online from one device.
eSIM makes multi-device life easy
With eSIM, you don’t need a drawer full of plastic SIMs. You can add a data-only plan to a compatible tablet or watch in minutes, and switch travel plans on and off as needed. It’s the cleanest way to run several devices without clutter. For long-haul trips with multiple gadgets, a Global eSIM can keep your essential device connected across continents.
A quick decision guide
- Is it your main phone? Full plan.
- Is it a tablet, hotspot, watch or second device? Data-only.
- Does it travel with you? Add a travel eSIM for the trip.
The bottom line
Match the SIM to the device and you stop paying for things you never use. A full plan for the phone you actually call from, data-only plans for everything else, and a travel eSIM when those devices go abroad. It’s a small bit of housekeeping that quietly trims your monthly costs. Start by sizing up your devices on our plans page, and see the full range at Extrafon.