Getting started with your SIM.

Just joined Three? Check out our top tips for your first 30 days in our Welcome guide.

Getting started with your Pay As You Go SIM is easy, whether you've received our new Trio SIM or a single standard, micro or nano SIM.

Please remember to check our Top-up & get started guide to make sure your phone is properly set up and compatible with your Three SIM before you begin. If you're interested in purchasing a SIM-only deal, check out our SIM-only deals store.

Our new Trio SIMs.

A Trio SIM has all SIM types on one card, so whether you need a standard, micro or nano-SIM, you can just pop out the one you need. It will work in any unlocked 3G or 4G phone. If you're not sure which SIM you'll need, check out this page.

If you're not sure if yours is a Trio SIM, please check the images (front and back) below:

Our single SIMs.

If you haven't received a Trio SIM you'll be using a single standard, micro or nano SIM, as shown below:

Getting started on your iPhone with Trio SIM.
Getting started on any other device with Trio SIM.
Getting started with our single SIMs.

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