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What's the difference between the SIMs available?

Currently available for your phone are the nano, micro and standard sized SIMs and they all function in the same way. The small, removable chip that holds your contacts, your SIM connects your phone to your network so you can make calls, send texts and use the internet.


What is it?

What kind of phone uses it?

Nano SIM

Nano SIM

This is the smallest of all SIMs and is currently being used in a small number of smartphones.

iPhone 5/5c/5s

iPad Mini

Micro SIM

Micro SIM

This is also known as a 3FF SIM. This page explains how to activate a micro SIM.

iPhone 4/4s


Sony Xperia Z

Samsung Galaxy S4 

iPad with Retina Display 

iPad 2 

Most 3G/4G tablet

Standard SIM

Standard SIM

This is also known as a 2FF SIM, the most commonly used SIM.

Samsung Galaxy Ace

Nokia Asha phones

Older BlackBerry phones

BlackBerry SIM

This is a standard SIM card, but comes with BlackBerry internet data, allowing you to use the full range of internet features on your BlackBerry. It is not required for the latest BlackBerry phones running BlackBerry 10 OS or higher.

BlackBerry Bold 9900

BlackBerry Curve 9320

Combi SIM

Micro SIM

A standard SIM that has a micro SIM inside it. The adaptor, or frame, makes the SIM the same size as a standard SIM, but the inner micro SIM can be popped out, for use in newer smartphones. You can then put the micro SIM back into the adaptor for use with older phones. Combi SIMs are used on O2, Orange and T-Mobile.

Nokia Asha

Samsung Galaxy S4.

How do I transfer my contacts from one SIM to another?

  • Visit us in store and we can copy your contacts over for you.
  • Depending on the software available on both phones and their compatibility, you may be able to save your contacts to your computer, then retrieve them using the software on your new phone.
  • Again, depending on both phone's software, you may also be able to move your contacts via Bluetooth.
  • In our stores that have Geek Squad services, we can use a SIM cutter to trim your standard SIM to a smaller one. We don't recommend using a SIM cutter yourself. The contact areas (the gold area) on different SIMs can vary in size, so it needs a trained hand to do the job correctly!

What are SIM adapters?

  • SIM adapters are small, plastic holders which a SIM can be inserted into, increasing its size and allowing it to slot into different SIM spaces. Here are some of the SIM adapters available.

Got more SIM questions?

SIM troubleshooting tips
SIM only deals explained
SIM swap

SIM only deals

Have a look at our best SIM only deals

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Dixons Carphone PLC 2015