What size SIM do I need?

What size SIM do I need?

There are loads of different smartphones, tablets and dongles on the market, each with different features, specs and USPs. They all require a SIM card, but while all SIM cards work in the same way and do the same job, they nevertheless come in different sizes.


Here’s our guide to the different types of SIM available.


Standard SIM.


This is the ‘normal’ sized SIM, the size you’re probably used to seeing over the years. These SIMs are mainly used in older phones and devices. That means devices like iPhone 3GS and Samsung Galaxy S II.


Micro SIM.


As the name suggests, these SIM cards are a smaller version of standard SIM cards. It’s about half the size of a standard SIM and while it was first used with iPhone 4, most modern smartphones now predominantly use a micro SIM.


Nano SIM.


This is the smallest SIM of the three – it’s around 40% smaller than a micro-SIM. Apple has made the nano SIM the standard SIM for all their devices, such as iPhone 5, 5s, 5c, 6 and iPad Mini.


While the newest Apple devices all require a nano SIM, they’re not on their own. Nokia have recently followed suit with phones such as the Nokia Lumia 1520; while HTC have also started to utilise the nano SIM with the HTC One M8, and more manufacturers are likely to follow suit.


Why have SIMs changed in size?


It mainly boils down to advances in technology and improved usability. A smaller SIM means you can have a thinner, lighter phone.


Did you get your device from Three?


If you didn’t buy your phone, tablet or dongle from Three, you may not have the right sized SIM for your device. If you don’t, you’ll need to visit a Three store or give us a call to get a different sized SIM or a free SIM adapter.


You may want to check out this guide on how to use a SIM adapter.


Getting a SIM card from Three.


You can use Three SIMs in any 3G or 4G phone, tablet or dongle so long as it’s unlocked. Devices from Three come unlocked as standard, but if your device is locked to a different network, click here for help unlocking it.


We offer a one-month rolling contract and 12-month contracts for any sized SIM.


To talk about the right SIM for you, pop into your nearest Three Store or give us a call on 0843 373 3333*.



*calls cost 5p per minute from a BT landline, other networks may vary.