Sim Only

Value from as little as £8 a month
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Do the smart thing if you already have a device but need a package which offers great value for money.

The range of sim only contracts available from Three offer fantastic value with inclusive minutes, texts and data.  Starting from only £8 a month, you can tailor the needs of your package with the ability on Three to control you spend, which is great if you don’t want a shock when the bill comes through.

In fact Three have been rated Number 1 network for Smartphones and Number 1 network for value for money on iPhone.


Available in a choice, 1 month rolling contracts offer value without the long term commitment given you the option to upgrade or change plan at any time.

If you are looking for even better value, signing up to a 12 month sim extends that value of a 1 month with a reduction in price.

Decide on the size of the sim card you need.

If you are unsure about the type of sim card you will need, try locating the type of sim card in your instruction manual or the manufacture website.

You can always use a sim adapter if you choose the wrong size and you need to go bigger. These can be picked up free from your local Three store. However if you need to reduce the size of your sim, your best option is to call customer services on 333 from an existing Three phone, 0333 300 3333 from a landline or mobile or by going into a Three store. Note, only the account holder will be able to replace the sim in store. Three do not charge for this service in store. Avoiding cutting or trimming the size of the sim.

Nano Sim

For some of the latest smartphones, including: iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, iPhone 5s, iPhone 5, Samsung Galaxy S6.

Micro Sim

For slightly older smartphones, including: iPhone 4s, iPhone 4, Samsung Galaxy S4, Samsung Galaxy S4 Mini, Samsung Galaxy S III.

Standard Sim

For older phones, including: Samsung Galaxy S III Mini, Samsung Galaxy S II, iPhone 3GS, HTC Desire C.

How many minutes do you need.

Knowing how many minutes you are going to need can be often quiet tricky as you don’t want to have the fear of running up call charges for running out of minutes. On Three you have the benefit of controlling your spend, meaning you can cap your minute usage in a number of ways. You can block out of bundle calls, premium rate calls or both. You can read more on how to do this on our How 1to3 page.

If you are currently on a Pay Monthly plan, then looking out a couple of your existing bills to get an idea of what you may need. If you are still unsure, try to match a plan with your budget. If you start on a lower minute plan you can always move to a higher minute plan during the contract, however note that on Three this would not take effect until your next Bill Cycle.

How much data do you need.

Being on Three means you have access to the most reliable and consistent data experience of all UK customers. So like your minutes, you can get an idea of what your data usage is currently by looking at your existing bill. However, if you currently own an Apple iOS device or an Android device you have the ability to look at what your data usage of 3G/4G has been. To see how to do this, please see our How 1to3 page of checking your mobile data on a device.

Keeping control of your data spend is automatically controlled when you are on Three. All data plans are capped meaning you won’t be able to run up a bill and you have complete control. But if you sign up to a plan and realise you’re just using more data on the go, either through your handset or as a personal hotspot, you can simply purchase a £5 add on to get double your data for the rest of your bill cycle using My3. Using it often and you may find it is cheaper to change your tariff up to make a saving long term.



Now you've made your choice, lets now look at the price.