Sim card

What size SIM do I need for my phone?

Full size, Micro or Nano SIM? It can be confusing working out which SIM your phone needs. Here is what you need to know.

Phone SIMs currently come in one of three sizes, but the reality is that all of these SIM sizes work off the same electrical circuitry; the larger sizes simply have more plastic around the main SIM circuit for ease of handling and durability. Current SIM technology means that we won’t see a smaller SIM than the Nano as its surface area is quite literally the entire electrical interface with all extraneous plastic cut away.

Older phones use the full sized SIM card -- technically it's the Mini SIM, because the very first SIM card format was even larger, but it's informally called the Full Sized SIM by most providers -- while newer phones will either use a Micro or smaller Nano SIM.

If you’re buying a phone on contract your provider will provide a suitable sized SIM card for you to use, but if you’re in the prepaid market you’ll need to match your SIM card size to the phone of your choice.

The reality is that most modern flagship phones these days all use the nano SIM card standard, which is good news for when you need to swap phones.


Most providers will offer a multi-sized SIM package that starts out as a full-sized SIM with the ability to pop the Micro or Nano sized SIM from the larger SIM. It’s wise to know the size you need to pop out, however, as if you go too small it can be difficult to reinsert it into the plastic of the larger card -- and it’s not advisable in any case.

SIM sizes for popular phone models

DeviceSIM Size
Apple iPhone 7Nano
Apple iPhone 7 PlusNano
Apple iPhone SENano
Apple iPhone 6sNano
Apple iPhone 6s PlusNano
Apple iPhone 6Nano
Apple iPhone 6 PlusNano
Samsung Galaxy S7Nano
Samsung Galaxy S7 EdgeNano
Samsung Galaxy S6Nano
Samsung Galaxy S6 EdgeNano
Samsung Galaxy S6 Edge+Nano
Samsung Galaxy Note 7Nano
Samsung Galaxy Note 5Nano
Sony Xperia XNano
Sony Xperia X PerformanceNano
Sony Xperia XANano
Sony Xperia Z5Nano
HTC 10Nano
HTC One M9Nano
HTC One M8Nano
LG G4Micro
LG G3Micro
Google Nexus 5XNano
Google Nexus 6PNano
Google Nexus 5Micro

Can’t find your phone in the list above? Your phone manual (or the website for your phone from your manufacturer) should be able to tell you what size SIM you need.

Should I use a SIM card adaptor?

One way to use a smaller sized SIM in a phone that requires a larger SIM is to use a SIM card adaptor. These aren’t much more than the replacement plastic (or sometimes metal) that makes up the "missing" space on a Nano or Micro SIM so that you can use them in a phone that takes a larger sized SIM.

Most manufacturers don’t recommend the use of SIM card adaptors, however, and for good reason. Because the SIM sits in the adaptor, there’s a high probability of it moving when you insert or remove the sim, scraping plastic or metal across the delicate internal pins that connect to the SIM card itself for proper operation. These can very easily snap, at which point you’re looking at an expensive phone repair. Comparatively, picking up a new SIM card is a markedly cheaper prospect. You can check out our guide to porting your existing mobile number to a new SIM here.

Lead Image: Shutterstock

Picture: Wikimedia Commons, licensed under Creative Commons Attribution-Share Alike 3.0 Unported (image cropped)

Alex Kidman

Alex is the Telco Editor at He's been writing about consumer technology topics for the best part of two decades, and enjoys breaking down complex topics into their component parts.

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