SIM only - Wisemium

SIM only comparison

Keep your phone, upgrade your value.

Why pay for a handset you already own? Wisemium analyzes the market to find SIM-only plans that offer more data for less spend. We simplify the fine print so you can switch with confidence.

Compare top-tier networks instantly.

Compare Deals From UK's Biggest Networks

Compare SIM-Only Deals

Compare top UK broadband deals and save on monthly bills.

Provider

Tariff Type

Fixed

Flexible

Green

Standard

Variable

Fuel Type

Dual fuel

Monthly Cost

£0-£80

£81-£90

£0

Setup Fee

Runs on EE

Network

Unlimited

Data

£22

Per Month

£0

Setup Fee

Runs on EE

Network

Unlimited

Data

Yes

Check terms

Annual Price

30 Days

Contact

£22

Monthly Price

£0

Setup Fee

Runs on EE

Network

30 GB

Data

£14

Per Month

£0

Setup Fee

Runs on EE

Network

30 GB

Data

Yes

Check terms

Annual Price

30 Days

Contact

£14

Monthly Price

£0

Setup Fee

Runs on EE

Network

30GB X 3 months

Data

£12

Per Month

£0

Setup Fee

Runs on EE

Network

30GB X 3 months

Data

Yes

Check terms

Annual Price

30 Days

Contact

£12

Monthly Price

£0

Setup Fee

Runs on EE

Network

Family Unlimited Deal

Data

£12.5 (50% OFF)

Per Month

£0

Setup Fee

Runs on EE

Network

Family Unlimited Deal

Data

Yes

Check terms

Annual Price

30 Days

Contact

£12.5 (50% OFF)

Monthly Price

£0

Setup Fee

Runs on EE

Network

Family Unlimited Deal

Data

£25 ( 1st Sim)

Per Month

£0

Setup Fee

Runs on EE

Network

Family Unlimited Deal

Data

Yes

Check terms

Annual Price

30 Days

Contact

£25 ( 1st Sim)

Monthly Price

£0

Setup Fee

Runs on EE

Network

200 GB

Data

£20

Per Month

£0

Setup Fee

Runs on EE

Network

200 GB

Data

Yes

Usually no mid contract rise

Annual Price

30 Days

Contact

£20

Monthly Price

£0

Setup Fee

Runs on EE

Network

100 GB

Data

£15

Per Month

£0

Setup Fee

Runs on EE

Network

100 GB

Data

Yes

Usually no mid contract rise

Annual Price

30 Days

Contact

£15

Monthly Price

£0

Setup Fee

Runs on EE

Network

50 GB

Data

£10

Per Month

£0

Setup Fee

Runs on EE

Network

50 GB

Data

Yes

Usually no mid contract rise

Annual Price

30 Days

Contact

£10

Monthly Price

£0

Setup Fee

Runs on EE

Network

1 GB

Data

£5

Per Month

£0

Setup Fee

Runs on EE

Network

1 GB

Data

Yes

No mid-contract price rise

Annual Price

30 Days

Contact

£5

Monthly Price

£0

Setup Fee

Chattr

Network

Unlimited

Data

£10

Per Month

£0

Setup Fee

Chattr

Network

Unlimited

Data

Yes

Check terms

Annual Price

No Contract

Contact

£10

Monthly Price

£0

Setup Fee

Mozillion

Network

Unlimited

Data

£22

Per Month

£0

Setup Fee

Mozillion

Network

Unlimited

Data

Yes

No mid-contract price rise

Annual Price

24 months

Contact

£22

Monthly Price

£0

Setup Fee

Mozillion

Network

100 GB

Data

£12

Per Month

£0

Setup Fee

Mozillion

Network

100 GB

Data

Yes

No mid-contract price rise

Annual Price

24 months

Contact

£12

Monthly Price

£0

Setup Fee

Mozillion

Network

80 GB

Data

£11

Per Month

£0

Setup Fee

Mozillion

Network

80 GB

Data

Yes

No mid-contract price rise

Annual Price

24 months

Contact

£11

Monthly Price

£0

Setup Fee

Mozillion

Network

30 GB

Data

£9

Per Month

£0

Setup Fee

Mozillion

Network

30 GB

Data

Yes

No mid-contract price rise

Annual Price

24 months

Contact

£9

Monthly Price

£0

Setup Fee

02

Network

20 GB

Data

£From £12

Per Month

£0

Setup Fee

02

Network

20 GB

Data

Yes

May apply

Annual Price

12 months

Contact

£From £12

Monthly Price

£0

Setup Fee

Vodafone

Network

50 GB

Data

£From £15

Per Month

£0

Setup Fee

Vodafone

Network

50 GB

Data

Yes

May apply

Annual Price

24 months

Contact

£From £15

Monthly Price

£0

Setup Fee

EE

Network

25 GB

Data

£From £15

Per Month

£0

Setup Fee

EE

Network

25 GB

Data

Yes

May apply

Annual Price

12 months

Contact

£From £15

Monthly Price

£0

Setup Fee

Three

Network

30 GB

Data

£From £13

Per Month

£0

Setup Fee

Three

Network

30 GB

Data

Yes

May apply

Annual Price

12 months

Contact

£From £13

Monthly Price

£0

Setup Fee

02

Network

20 GB

Data

£From £15

Per Month

£0

Setup Fee

02

Network

20 GB

Data

Yes

May apply

Annual Price

12 months

Contact

£From £15

Monthly Price

£0

Setup Fee

02

Network

10 GB

Data

£From £6

Per Month

£0

Setup Fee

02

Network

10 GB

Data

Yes

May apply

Annual Price

12 months

Contact

£From £6

Monthly Price

£0

Setup Fee

Three

Network

30 GB

Data

£From £12

Per Month

£0

Setup Fee

Three

Network

30 GB

Data

Yes

May apply

Annual Price

12 months

Contact

£From £12

Monthly Price

£0

Setup Fee

Vodafone

Network

15 GB

Data

£From £7

Per Month

£0

Setup Fee

Vodafone

Network

15 GB

Data

Yes

Often no annual rise

Annual Price

30 Days

Contact

£From £7

Monthly Price

£0

Setup Fee

02

Network

20 GB

Data

£From £10

Per Month

£0

Setup Fee

02

Network

20 GB

Data

Yes

Usually flexible

Annual Price

30 Days

Contact

£From £10

Monthly Price

£0

Setup Fee

Vodafone

Network

30 GB

Data

£From £10

Per Month

£0

Setup Fee

Vodafone

Network

30 GB

Data

Yes

Usually flexible

Annual Price

30 Days

Contact

£From £10

Monthly Price

£0

Setup Fee

Three

Network

50 GB

Data

£From £15

Per Month

£0

Setup Fee

Three

Network

50 GB

Data

Yes

Usually no mid contract rise

Annual Price

30 Days

Contact

£From £15

Monthly Price

£0

Setup Fee

Vodafone

Network

25 GB

Data

£From £13

Per Month

£0

Setup Fee

Vodafone

Network

25 GB

Data

Yes

Usually flexible

Annual Price

30 Days

Contact

£From £13

Monthly Price

£0

Setup Fee

EE

Network

25 GB

Data

£From £10

Per Month

£0

Setup Fee

EE

Network

25 GB

Data

Yes

Usually flexible

Annual Price

30 Days

Contact

£From £10

Monthly Price

£0

Setup Fee

02

Network

20 GB

Data

£From £9

Per Month

£0

Setup Fee

02

Network

20 GB

Data

Yes

Usually no mid contract rise

Annual Price

12 months

Contact

£From £9

Monthly Price

Prices and offers may change. Please check the provider website for the latest terms.

Understanding the SIM-Only Advantage

Traditional mobile contracts often hide the true cost of a device within your monthly bill. A SIM-only plan strips away those hidden hardware costs, focusing entirely on what you actually use: your data, minutes, and texts.

With a SIM-only deal, you need to provide the device. That means using a phone you’ve already got or buying a new one.

Understanding Your SIM Card

Modern mobile technology uses three primary formats: Standard, Micro, and Nano. To make things simple, Wisemium provides “Multi-SIMs”—a clever 3-in-1 design that allows you to pop out the exact size your specific device requires.

SIM cards come in different sizes: Standard, Micro and Nano. Once you’ve chosen your SIM-card deal, you’ll probably receive a Multi or Combi SIM, which gives you a choice of all three sizes. You pick the one that fits your mobile phone.

Your SIM is highly portable and can be moved between any compatible devices. To use your new SIM, your phone must be unlocked (not restricted to a specific carrier). To test this, simply insert the card; if you see network bars and can place a call, your device is ready. If not, your previous provider can typically unlock the handset for you.

Understanding eSIM Technology

A SIM-only deal allows you to pay exclusively for your network services—data, minutes, and texts—without the added monthly expense of a handset loan. Transitioning from a standard mobile contract to a SIM-only plan typically results in a significant reduction of your monthly bill. However, keep in mind that you must provide your own device, either by using your current phone or purchasing one separately.

Instead of inserting a plastic card, you activate an eSIM digitally by scanning a QR code or using a dedicated provider app. This digital transition is growing rapidly; global mobile associations project that over a third of all smartphones will rely on eSIM technology by 2026.

eSIM technology is featured in most modern handsets released over the last decade. To use this service, you will need a compatible device, such as:

You’ll need a newer iPhone or Android phone, such as:
Apple: iPhone XR, XS, and all subsequent models.
Google: Pixel 2 and all newer generations.
Samsung: Galaxy S20 series and all later flagships.
Sony: Xperia 1 IV, 10 IV, 1 MK5, and 10 MK5.
Others: Recent premium models from Motorola, Huawei, Oppo, and Rakuten.

How do I get a cheap mobile phone deal?

The best way to find a deal that suits you is to compare networks and phone packages through Wisemium. Being flexible on the network you choose massively opens up your options, but make sure to check the coverage for your area before committing to a deal. Here are some effective ways to save money:

Available SIM-Only Options in the UK

Long-Term Contracts (12 & 24 Months)

These plans offer a fixed monthly allowance for data, calls, and texts. You are billed monthly, removing the need for manual credit top-ups.

Flexible Rolling Monthly Plans

These 30-day contracts renew every month and offer the freedom to switch or cancel your plan with just one month’s notice.

No-Contract Pay As You Go (PAYG)

Ideal for light users, this option requires you to add credit to your SIM and pay only for the exact amount of data, minutes, and messages you consume.

Data-Only Solutions

These plans focus entirely on internet connectivity. While they do not traditionally include a standard phone number for cellular calls, they are perfect for tablets or users who rely solely on data-based communication apps.