Best for most people - Lycamobile - 5GB for £5 (first month £2.50)

Best for heavy users - Smarty - 80GB for £8

Best unlimited - Smarty - £16

Best for most people - Lycamobile - 5GB for £5 (first month £2.50)

This is the best deal for most people because:

It's cheap and most people use less than 5GB per month.

But please note that many people need more than 5GB - the average monthly data use in the UK is 9GB.

So the Smarty 12GB for £6 and 80GB for £8 deals are also worth considering.

Because with those deals you get lots more data for just a little bit of extra money.

The closest equivalent deals from EE, O2, Three and Vodafone are:

Unlimited data for £14.50 (with speed restrictions) or £23.50 (without restrictions) with EE.

Both EE deals increase by £1.50 in March 2026 and are exclusive to new & existing EE Broadband customers.

4GB for £19 with Three (increases by £1 in April 2026)

5GB for £23 with O2 (increases by £1.80 every April)

5GB for £29 with Vodafone (increases by £1.80 in April 2026)

Best for heavy users - Smarty - 80GB for £8

This is the best deal for heavy users because:

80GB per month is enough for the vast majority of people.

This deal provides that for a very low price and without any speed restrictions.

This is an exclusive deal that's cheaper than going to Smarty directly so please use this link.

The closest equivalent deal also comes from Smarty:

150GB for £12

There are no close equivalent deals from O2, Three or Vodafone.

But the unlimited EE deals above are worth considering if you are an EE Broadband customer.

And they're available if you join EE Broadband as a new customer too.

Best unlimited - Smarty - £16

This is the best unlimited deal because:

You get totally unlimited usage without any speed restrictions at a very low price.

This is an exclusive deal that's cheaper than going to Smarty directly so please use this link.

The closest equivalent deal from another network is:

£25 with Lycamobile (first month £12.50)

The closest equivalent deals from EE, O2, Three and Vodafone are:

£14.50 (with speed restrictions) or £23.50 (without restrictions) from EE

Both EE deals increase by £1.50 in March 2026.

And are exclusive to both new and existing EE Broadband customers.

£31 with the first month £15.50 from Three (increases by £1.50 in April 2026)

£36 with O2 (increases by £1.80 every April)

£48 with Vodafone Unlimited Max (increases by £1.80 in April 2026)

Cheaper Vodafone unlimited plans are available but those have speed restrictions.

We compared 183 deals from our providers before handpicking the deals above.

If you'd like further information about any of these deals please contact our experts here.

You can also view our recommended 12 and 24 month SIM only deals here.