What's the difference between a standard SIM, micro-SIM and nano-SIM?

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

There are now three different sizes of SIM you might need to use, depending on your device: a standard SIM, micro-SIM or nano-SIM. We'll send you the right SIM for your phone when you take out your contract or upgrade with us. If you're interested in purchasing a SIM-only deal, check out our SIM-only deals store.

If you're using a device that you didn't get from Three, you may not have the right sized SIM for your device to work. If that’s the case and you’re a Pay Monthly customer, you can order a replacement online. If you’re a Pay As You Go customer, you can visit a Three Store or contact us to order a replacement SIM.

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

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