Data only SIMs - March 2026

Our best data only SIM deals this week

What is a data only SIM?

A data-only SIM works like a regular SIM, but it only provides mobile data. You can use it to get online when you’re away from Wi-Fi.

They’re commonly used in:

• Tablets and iPads
• Laptops with SIM slots
• Mobile broadband dongles
• Portable Wi-Fi routers

If you only need internet access, a data-only SIM can be a flexible and often lower-cost option.

How much data do I need?

The right data allowance depends on how you use the internet.

• Light use (emails, browsing): 1GB to 5GB
• Moderate use (streaming music, social media): 10GB to 30GB
• Heavy use (video streaming, hotspotting): 50GB+ or unlimited

If you plan to stream in HD or connect multiple devices, higher or unlimited data is usually more suitable.

Pay monthly vs PAYG data SIMs

You can choose between two main types of plan:

Pay monthly

• Fixed allowance each month
• Usually better value for regular use
• Available on 1, 12 or 24-month contracts

Pay as you go (PAYG)

• No long-term commitment
• Top up as needed
• Useful for occasional or backup use

Using a data-only SIM abroad

Some plans include roaming, but this varies by network.

• Check if your allowance works in your destination
• Look for fair usage limits
• Watch for daily or per-GB charges

Roaming policies can change, so it’s worth checking the latest terms before you travel.

What to consider before choosing a deal

Before you pick a data-only SIM, think about:

• Coverage: Not all networks perform equally in every area
• Speed: 4G and 5G availability can affect performance
• Device compatibility: Make sure your device supports the SIM size and network
• Tethering: Some plans limit hotspot use
• Total cost: Factor in any price increases during the contract

Why compare data-only SIMs with us?

We make it easier to find a deal that works for you.

• Compare a wide range of networks and plans
• Filter by data, price and contract length
• See the latest offers in one place

Our goal is to help you feel confident you’re choosing the right option for your needs

Pros and cons of data only SIMs

Pros

• Small savings to be made because you’re not paying for calls and texts
• Option to use your data only SIM in a MiFi or laptop, if you need to

Cons

• A data only SIMs might be overkill if you only really use your tablet at home
• Savings are minimal compared with standard SIMs with calls and text allowances

Alternative SIM only plans

• 12-month SIM deals
• Pay as you go SIM deals
• Bad credit SIM only deals
• SIM only deals
• 30-day SIM only deals
• Unlimited data SIM only deals

How much data does the average person use?

The average person in the UK uses around 5.6GB of mobile data per month, according to Ofcom.

For data-only SIMs, your needs may be higher depending on the device and usage:

• Browsing and emails: 1GB to 5GB
• Streaming music and social media: 10GB to 30GB
• Video streaming or hotspot use: 50GB or unlimited

If you regularly stream video on the move, a larger allowance can help you avoid extra charges.

Do data-only SIMs expire?

Yes, all data-only SIM plans have a validity period. If you don’t use your data within that time, it will expire.

• Pay monthly plans refresh your allowance each month
• Pay as you go deals usually have a set usage window

Some providers offer longer validity on PAYG bundles, but terms vary, so check before you buy.

Can I get a pay as you go data-only SIM?

Yes, pay as you go data-only SIMs are widely available, including on 5G networks.

They let you:

• Pay upfront for a set amount of data
• Avoid long-term contracts
• Use data as needed within a set period

Providers such as Three, EE and Lebara offer PAYG data SIM options. In some cases, a rolling 30-day contract may offer better value if you use data regularly.

Can you use a data-only SIM in a smartphone?

Yes, a data-only SIM will work in a smartphone.

However, it won’t include calls or texts. To communicate, you’ll need to use internet-based apps such as:

• WhatsApp
• FaceTime
• Skype

Which devices can I use with a data-only SIM?

Data-only SIMs are compatible with a range of devices, including:

• Tablets
• Laptops with SIM support
• Dongles and mobile Wi-Fi devices
• Smartphones

Always check your device supports the correct SIM size and network bands.

Can I use a hotspot with a data-only SIM?

Yes, you can tether or create a personal hotspot using a data-only SIM.

This allows you to share your connection with other devices. Keep in mind:

• Hotspot use can consume data quickly
• Some networks may apply limits or fair usage policies

Check your plan details if you plan to tether regularly.

Can I use a data-only SIM abroad?

Yes, but roaming terms depend on your provider.

• Some plans include roaming within certain destinations
• Others charge daily fees or require add-ons
• Fair usage limits may apply

Roaming policies change regularly, so it’s important to check your provider’s latest terms before travelling.