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30 Day SIM Only Deals

Compare the cheapest and best 30 day SIM Only plan deals

  • The best 30 day SIM Only plans in one place
  • Compare deals on all networks
  • Every single plan comes with 5G data included

 

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iD Mobile

Uses Three's network

iD Mobile SIM Deal

1 month contract

unlimited minutes

unlimited texts

30GB

5G data

£7.00

a month

Data Rollover & Worldwide Roaming
iD Mobile

Uses Three's network

iD Mobile SIM Deal

1 month contract

unlimited minutes

unlimited texts

50GB

5G data

£8.00

a month

Data Rollover & Worldwide Roaming
Smarty

Uses Three's network

Smarty SIM Deal

1 month contract

unlimited minutes

unlimited texts

16GB

5G data

£8.00

a month

EU roaming & No annual price rises
iD Mobile

Uses Three's network

iD Mobile SIM Deal

1 month contract

unlimited minutes

unlimited texts

110GB

5G data

£10.00

a month

Data Rollover & Worldwide Roaming
giffgaff

Uses O2's network

giffgaff SIM Deal

1 month contract

unlimited minutes

unlimited texts

40GB

5G data

£10.00

a month

Double data
EU Roaming
VOXI

Uses Vodafone's network

VOXI SIM Deal

1 month contract

unlimited minutes

unlimited texts

60GB

5G data

£12.00

a month

Unlimited Music
Unlimited Social Media
Talkmobile

Uses Vodafone's network

Talkmobile SIM Deal

1 month contract

unlimited minutes

unlimited texts

4GB

5G data

£4.95

a month

Free EU Roaming
Lebara Mobile

Uses Vodafone's network

Lebara Mobile SIM Deal

1 month contract

unlimited minutes

unlimited texts

5GB

5G data

£5.00

a month

25% off for for 3 months w/ code Lebara25
Save 50% with code SAVE50
Mobile networks may increase prices in line with the consumer price index each year. Please check individual network's terms before purchasing.
  • Overview

Overview

A 1-month 5G SIM Only deal is a great choice if you already have a phone that you’re happy with, and you don’t want to be tied into a contract.

Plus, a large number of networks offer 1-month 5G SIM Only deals, and there’s now widespread 5G coverage across the UK, so there’s never been a better time to buy one of these deals.

What is a 1-month 5G SIM Only deal?

A 1-month 5G SIM Only deal provides you with a SIM card and a monthly assortment of allowances, but you don’t get a new phone with it, so you’ll need to either be happy with your current handset or to buy a new one separately.

You aren’t tied into a contract though, so you can change or cancel your plan whenever you want.

Why choose a 1-month 5G SIM Only deal?

If you choose a 1-month 5G SIM Only deal then you won’t be locked into a contract, meaning you’re free to change or cancel your plan whenever you like.

You might want to do that if for example you find you need more or less data than your allowances provide, or if you spot a great deal on another plan or network.

Many SIM Only plans make you commit to a 12-month contract, so they’re nowhere near as flexible as these, and if you buy a new 5G phone on contract then you’re typically tied in for 24 months – so the wait before you can change your plan is even longer.

Which networks offer 1-month 5G SIM Only deals?

The selection of networks offering 1-month 5G SIM Only deals will occasionally change, but at the time of writing it includes Three, Vodafone, O2, Asda Mobile, Giffgaff, iD Mobile, Lebara, Lyca Mobile, Smarty, Talkmobile, Virgin Mobile, and VOXI.

So in other words you can get a 30-day SIM plan on the majority of networks.

Which 1-month 5G SIM Only deal should I choose?

The right 1-month 5G SIM Only deal will depend on your needs and budget, but there are a few things to consider.

First off, you should make sure the network you choose has 5G coverage where you need it. For that, head to our dedicated 5G coverage page for the network in question, or to its official coverage checker. Note however that 5G coverage is improving all the time, so places that don’t have 5G now may do soon.

Then you should think about your allowances. Most plans come with unlimited minutes and texts as standard, so in general it’s just the data limit you need to think about.

More data will come with a higher monthly cost, but if you’re regularly using the internet when not connected to Wi-Fi then a high data allowance – or even unlimited data – could be worth having.

Beyond that, consider how much you’re willing to spend, and bear in mind the extras some networks have, and their roaming terms.

FAQs

Will a 5G SIM card work in a 4G phone?

Yes, a 5G SIM card will work just fine in a 4G phone, but you won’t get 5G speeds unless you have a 5G phone.

Can I get unlimited data with a 1-month 5G SIM Only deal?

Absolutely. A number of 30-day 5G SIM Only deals come with unlimited data included.

Can I keep my number when switching to a 1-month 5G SIM Only deal?

Yes, you can keep your number when switching to a 30-day 5G SIM Only deal, and the process is simple – just text the word ‘PAC’ to 65075 from the number you want to keep, and you’ll be sent a PAC code in response. You then give this to the new network you’re joining, and they’ll transfer your number.

What if I’m not in a 5G coverage area?

If you’re not in a 5G coverage area then you’ll still be able to connect over 4G or 3G – your 5G SIM card will just whatever the best available connection is.

What SIM card size do I need?

Almost all phones use a nano SIM card, which is the smallest size, but you’ll be sent a multi-SIM which includes all possible sizes, so just compare these sizes to your old SIM card or your phone’s SIM card slot, and select the appropriate one.

Do 5G SIMs cost more than 4G ones?

Not usually. 5G now comes as standard on most networks, so you won’t pay any extra for it. There are a few exceptions to this, but 5G SIMs are no longer expensive in any case, and all of the deals on this page will include 5G data.

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