Your Smartphone SIM Type: Standard SIM, Micro SIM or Nano SIM?

January 3rd, 2014

Find out the type of SIM card required by your new smartphone: Standard SIM, Micro SIM or Nano SIM.

SIM cardIf you’re getting a new smartphone, you’ll need to have a SIM card that fits in your device. You’ll also need to pick the right size of SIM card when ordering a SIM Only contract or a Pay As You Go SIM card. Depending on the smartphone you have, there are three sizes of SIM card that could be appropriate for your handset: Standard SIM, Micro SIM or Nano SIM.

In this article, we look at the differences between the three types of SIM card. We’ll find out the size of SIM card required by different handsets and also how you can order a SIM card of the appropriate size for your phone. Finally, we’ll look at changing the size of your existing SIM card (e.g. switching to a Micro SIM or Nano SIM).

Introduction to SIM Card Sizes

SIM cards come in three different sizes: Standard SIM, Micro SIM and Nano SIM. Depending on the model of your smartphone or tablet, you’ll need to have a SIM card of the right size to fit in your device.

As of 2012, many new smartphones now use a Micro SIM card. This includes the Galaxy S3, Galaxy S4 and HTC One. If you’re upgrading your smartphone, you might need to change the size of your SIM card. You can order a Micro SIM directly from your mobile network.

To complicate the situation, there are a couple of handsets that use an even smaller version of the SIM card. If you have an iPhone 5s, iPhone 5c, iPhone 5 or Lumia 1520 you’ll need to have a Nano-sized SIM card.

SIM Card Sizes: Standard, Micro and Nano SIM
From left to right: Standard SIM, Micro SIM and Nano SIM. Adapted from Wikipedia (CC-licensed).

The dimensions of the three SIM card types compare are as follows:

SIM Type Alternative Name Length (mm) Width (mm) Height (mm)
Standard SIM 2FF or “Mini SIM” 25.00 15.00 0.76
Micro SIM 3FF 15.00 12.00 0.76
Nano SIM 4FF 12.30 8.80 0.67

Comparison of SIM card dimensions. Please note: Compared to Standard SIM and Micro SIM, Nano SIMs are 0.09mm thinner. This means it isn’t possible to cut your own regulation Nano SIM card.

All three SIM card types work in the same way from a technical perspective: they only differ in the amount of plastic housing that surrounds the metallic chip. Hence, if you’re willing to take the risk, you can cut your SIM card into a Micro-sized SIM (e.g. with a SIM cutting tool). However, we normally recommend ordering a SIM card of the right size directly from your mobile network. This is easier and safer. You can’t cut a Nano SIM due to the differences in thickness.

List of Handsets & Required SIM Card Size

Please select your handset manufacturer:

To find out which type of SIM card your phone requires, find it in the following tables:


AppleHandsetSIM Card Type
Apple iPhone 3GSStandard SIM
Apple iPhone 4Micro SIM
Apple iPhone 4SMicro SIM
Apple iPhone 5Nano SIM
Apple iPhone 5cNano SIM
Apple iPhone 5sNano SIM


BlackBerryHandsetSIM Card Type
BlackBerry 9720Standard SIM
BlackBerry Bold Touch 9900Standard SIM
BlackBerry Curve 9320Standard SIM
BlackBerry Curve 9360Standard SIM
BlackBerry Q10Micro SIM
BlackBerry Q5Micro SIM
BlackBerry Torch 9800Standard SIM
BlackBerry Z10Micro SIM
BlackBerry Z30Micro SIM


HTCHandsetSIM Card Type
HTC DesireStandard SIM
HTC Desire 300Micro SIM
HTC Desire 310Standard SIM
HTC Desire 500Micro SIM
HTC Desire 601Micro SIM
HTC Desire 610Nano SIM
HTC Desire 816Nano SIM
HTC Desire CStandard SIM
HTC Desire HDStandard SIM
HTC Desire XStandard SIM
HTC OneMicro SIM
HTC One M8Nano SIM
HTC One MaxMicro SIM
HTC One miniMicro SIM
HTC One mini 2Nano SIM
HTC One SMicro SIM
HTC One VStandard SIM
HTC One XMicro SIM
HTC One X+Micro SIM
HTC Wildfire SStandard SIM
HTC Windows Phone 8SMicro SIM
HTC Windows Phone 8XMicro SIM


HuaweiHandsetSIM Card Type
Huawei Ascend G300Standard SIM
Huawei Ascend G330Standard SIM
Huawei Ascend G510Standard SIM
Huawei Ascend G6Micro SIM
Huawei Ascend MateMicro SIM
Huawei Ascend P1Standard SIM
Huawei Ascend P6Micro SIM
Huawei Ascend P7Micro SIM
Huawei Ascend W1Micro SIM
Huawei Ascend W2Micro SIM
Huawei Ascend Y530Micro SIM


LGHandsetSIM Card Type
LG G FlexMicro SIM
LG G2Micro SIM
LG G2 miniMicro SIM
LG G3Micro SIM
LG L70Standard SIM
LG Nexus 4Micro SIM
LG Nexus 5Micro SIM
LG Optimus GMicro SIM
LG Optimus L5 IIStandard SIM


MotorolaHandsetSIM Card Type
Motorola Moto EMicro SIM
Motorola Moto GMicro SIM
Motorola Moto G 4GMicro SIM
Motorola Moto XNano SIM
Motorola RAZR HDMicro SIM


NokiaHandsetSIM Card Type
Nokia Lumia 1020Micro SIM
Nokia Lumia 1320Micro SIM
Nokia Lumia 1520Nano SIM
Nokia Lumia 520Micro SIM
Nokia Lumia 525Micro SIM
Nokia Lumia 610Micro SIM
Nokia Lumia 620Micro SIM
Nokia Lumia 625Micro SIM
Nokia Lumia 630Micro SIM
Nokia Lumia 635Micro SIM
Nokia Lumia 710Micro SIM
Nokia Lumia 720Micro SIM
Nokia Lumia 800Micro SIM
Nokia Lumia 820Micro SIM
Nokia Lumia 920Micro SIM
Nokia Lumia 925Micro SIM
Nokia Lumia 930Nano SIM


SamsungHandsetSIM Card Type
Samsung Ativ SMicro SIM
Samsung Galaxy AceStandard SIM
Samsung Galaxy Ace 2Standard SIM
Samsung Galaxy Ace 3Micro SIM
Samsung Galaxy FameStandard SIM
Samsung Galaxy K zoomMicro SIM
Samsung Galaxy Mega 6.3Micro SIM
Samsung Galaxy MusicStandard SIM
Samsung Galaxy NexusStandard SIM
Samsung Galaxy NoteStandard SIM
Samsung Galaxy Note 3Micro SIM
Samsung Galaxy Note IIMicro SIM
Samsung Galaxy SStandard SIM
Samsung Galaxy S IIStandard SIM
Samsung Galaxy S IIIMicro SIM
Samsung Galaxy S III MiniStandard SIM
Samsung Galaxy S III mini VEStandard SIM
Samsung Galaxy S4Micro SIM
Samsung Galaxy S4 ActiveMicro SIM
Samsung Galaxy S4 miniMicro SIM
Samsung Galaxy S4 ZoomMicro SIM
Samsung Galaxy S5Micro SIM
Samsung Galaxy S5 miniMicro SIM
Samsung Galaxy YStandard SIM
Samsung Galaxy YoungStandard SIM
Samsung Nexus SStandard SIM


SonyHandsetSIM Card Type
Sony Xperia EStandard SIM
Sony Xperia E1Standard SIM
Sony Xperia JStandard SIM
Sony Xperia MMicro SIM
Sony Xperia M2Micro SIM
Sony Xperia miroStandard SIM
Sony Xperia SMicro SIM
Sony Xperia SPMicro SIM
Sony Xperia TMicro SIM
Sony Xperia ZMicro SIM
Sony Xperia Z UltraMicro SIM
Sony Xperia Z1Micro SIM
Sony Xperia Z1 CompactMicro SIM
Sony Xperia Z2Micro SIM

If your phone doesn’t appear on this list, please drop us a comment below and we’ll endeavour to add it as soon as possible.

Alternatively, measure the size of your current SIM card or refer to your handset’s documentation. The dimensions of each SIM card type are provided earlier in this article.

Ordering the Right SIM Card

Once you’ve determined the size of SIM card required by your phone, you’ll need to make sure you order the right size SIM. Most UK mobile networks now offer a choice of Standard SIM, Micro SIM and Nano SIM. On some networks, there’s a “Combi SIM” which incorporates the standard SIM and Micro SIM.

Standard Sized SIM

Standard Size SIM Card

All of the UK’s main mobile networks offer a standard-sized SIM card.

You can order a standard-sized SIM card via the following links:

Select Network to Order a Standard SIM…
EE Pay Monthly
EE Standard SIM*
Pay As You Go
EE Standard SIM*
giffgaff - Pay As You Go
giffgaff Standard SIM
O2 Pay Monthly
O2 Standard SIM
Pay As You Go
O2 Standard SIM
giffgaff Pay Monthly
Three Standard SIM
Pay As You Go
Three Standard SIM
Vodafone Pay Monthly
Vodafone Standard SIM
Pay As You Go
Vodafone Standard SIM

* If you need a standard-sized SIM card on EE, please select the “Combi SIM” option. The “Combi SIM” option incorporates a standard-sized SIM card.

Please select the “Standard SIM” option if prompted during the order process. For customers who are on Orange, T-Mobile or EE, please select the “Combi SIM” option.

Micro SIM

Micro SIM Card

Most UK mobile networks now offer a Micro SIM card. This may sometimes come in the form of a “Combi SIM” (a combination SIM) where the Micro SIM is pushed out from the centre of a standard-sized SIM.

You can order a Micro SIM from the following mobile networks:

Select Network to Order a Micro SIM…
EE Pay Monthly
EE Micro SIM*
Pay As You Go
EE Micro SIM*
giffgaff - Pay As You Go
giffgaff Micro SIM
O2 Pay Monthly
O2 Micro SIM
Pay As You Go
O2 Micro SIM
giffgaff Pay Monthly
Three Micro SIM
Pay As You Go
Three Micro SIM
Vodafone Pay Monthly
Vodafone Micro SIM
Pay As You Go
Vodafone Micro SIM

* If you need a micro SIM on EE, please select the “Combi SIM” option. A micro-sized SIM card will pop out from the combi SIM.

A Combi SIM includes a Standard SIM & Micro SIM
On certain networks (e.g. Orange, T-Mobile and EE), you’ll receive a combination SIM where the “Micro SIM” (highlighted in blue) can be popped out from a standard SIM.

If you currently have a Standard SIM which you’d like to turn into a Micro SIM, one option is to use a Micro SIM cutter (available from £5 on You can also order a replacement Micro SIM directly from your mobile network (free on most networks but £10 for customers on T-Mobile).

Nano SIM

Nano SIM

The following mobile networks offer a nano-sized SIM card:

Select Network to Order a Nano SIM…
EE Pay Monthly
Pay As You Go
giffgaff - Pay As You Go
giffgaff Nano SIM
O2 Pay Monthly
O2 Nano SIM
Pay As You Go
O2 Nano SIM
giffgaff Pay Monthly
Three Nano SIM
Pay As You Go
Three Nano SIM
Vodafone Pay Monthly
Vodafone Nano SIM
Pay As You Go
Vodafone Nano SIM

Please note: if your device requires Nano SIM, you aren’t able to use a “Combi SIM” card.

If you currently have a Standard SIM or Micro SIM which you’d like to turn into a Nano SIM, you should order a replacement directly from your mobile network (free on most networks but £10 for customers on T-Mobile). It isn’t possible to cut your own Nano SIM.

SIM Card Adapters: One way of changing your SIM card's size

Changing SIM Card Size

If you need to change your SIM card type, your mobile operator can usually do this for you for free. The only exception is for T-Mobile customers who need to pay £10. See our guide to changing your SIM card type for more information.

If you’re switching from Standard SIM to Micro SIM, you can also use a SIM cutting tool. This option is not available if you’re switching to Nano SIM.

If you need to use your Micro SIM or Nano SIM in an older handset (e.g. which requires Standard SIM), it’s possible to buy a SIM card adapter. We recommend caution when using SIM card adapters as they can sometimes damage your phone. Check out our guide on using a Micro SIM or Nano SIM in older handsets.


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About Ken

Ken Lo

I'm a freelance writer specialising in mobile technology. I've been blogging at Ken's Tech Tips since 2005 with the aim of demystifying mobile technology for the rest of us.

Before writing about mobile technology, my background was in space & atmospheric physics. I have also worked in software development. Nowadays, I help companies to explain mobile technology to their customers. Please check out my portfolio or get in touch for more information. I'm also on Google+.

Your Comments

We'd love to hear your thoughts and any questions you may have. So far, we've received 51 comments from readers. You can add your own comment here.

  1. lalruatsanga said:

    Does xperia c used micro sim or standard sim

    1. Ken Lo
      Ken replied:

      Hi lalruatsanga,
      The Xperia C uses micro-sized SIM cards. You can find out more in the Xperia C user guide.
      Hope this helps!

  2. Ndaro Lucas said:

    Hi everyone, I am having difficulties identifying which brand of Samsung Galaxy or LG uses a standard sim card, one that I could use when traveling in Europe or Africa. Recently I got a father’s day gift of Samsung galaxy s4 only to find that it was min and could not take my standard sim. So, I need help. I am especially interested in either Sumsung galaxy or in LG. Can someone help me? I would really appreciate.



    1. Ken Lo
      Ken replied:

      Hi Ndaro,
      The article above lists the size of SIM card for Samsung Galaxy and LG handsets. Your best bet would be to go through the list and to choose a suitable handset which uses Standard SIM.
      Unfortunately, most of the smartphones released in the past 2 years now use Micro SIM rather than Standard SIM. If you really need a handset which uses Standard SIM, a good bet might be the Galaxy S3 Mini. It’s a mid-range smartphone and is currently available for £128 (albeit it’s now two years old and has since been replaced by the S4 Mini).
      Hope this helps,

      1. Lucas Ndaro replied:


        Your comments, insights and the link you sent me were very helpful to my dilemma.
        Thank you.


  3. manda said:

    what size sim does sony xperia L use? tnx

    1. Ken Lo
      Ken replied:

      Hi Manda,
      The Sony Xperia L uses standard-size SIM cards.
      Hope this helps!

  4. Linda Thompson said:

    What type of sim does a Sony Ericsson Xperia X10 mini pro please?

    1. Ken Lo
      Ken replied:

      Hi Linda,
      The Sony Ericsson Xperia X10 mini pro uses standard-sized SIM cards.
      Hope this helps!

  5. Jason Kimmings said:

    hello, i have a sim card from the company 3 and the gold contacts got almost to the edge. the cutting line is over the top of the contacts, am i ok to cut over them or not? thanks!


    1. Ken Lo
      Ken replied:

      Hi Jason,
      It’s OK to cut through the gold contacts (they’re only the contacts – the actual chip itself is much smaller). You can see a diagram of the SIM card structure here. That said, I would always recommend going to a Three store and asking them to give you a new SIM. It’s free to change your size of SIM card and you don’t risk invalidating any warranties (e.g. in case a badly cut SIM damages your phone).
      Hope this helps,

  6. Martin hill said:

    I have an apple iphone on the orange changing to a monthly on 3G not sure what size SIM card i need.

    1. Ken Lo
      Ken replied:

      Hi Martin,
      The iPhone 5, iPhone 5s and iPhone 5c require nano-sized SIM cards.
      The iPhone 4 and iPhone 4S require micro-sized SIM cards.
      The iPhone 3G S and earlier models require standard-size SIM cards.
      Hope this helps!

  7. Fab said:

    Does the blackberry 9320 sim card fit into the sony xperia M smartphone ??

    1. Ken Lo
      Ken replied:

      Hi Fab,
      The SIM card for your BlackBerry 9320 would have been a Standard SIM whereas you now require a Micro SIM for the Xperia M. Before using the Xperia M, you’ll need to change the size of your SIM card. You can refer to this guide for more information.
      Hope this helps!

  8. Lollahe 67 said:

    Sony Xperia tipo

    1. Ken Lo
      Ken replied:

      Hi Lollahe,
      The Sony Xperia Tipo uses standard-sized SIM cards.
      Hope this helps!

  9. Steve said:

    I have a Motorola Razr Maxx. I am interested in getting a used Iphone 4s. Will I be able to simply swap out the SIM card from my Razr to the Iphone 4s?

    1. Ken Lo
      Ken replied:

      Hi Steve,

      Thanks for your comment! From what I’ve found, the RAZR MAXX uses Micro SIM. So the answer is yes, you can simply take the Micro SIM from your RAZR MAXX and insert it in an iPhone 4S (which also uses Micro SIM).

      Hope this helps!

  10. amlan said:

    can u tell me what is the sim size of sony xperia L??

    1. Ken Lo
      Ken replied:

      Hi Amlan,
      The Sony Xperia L uses standard-sized SIM cards (see the diagram on page 9 of the Xperia L user guide).
      Hope this helps!

  11. Kaiserludi said:

    Hi Ken.

    According to there is no so called Standard SIM. What you mean is the Mini SIM, as opposed to the full-size SIM, which has the size of a credit card.

    1. Ken Lo
      Ken replied:

      Hi Kaiserludi,
      You’re totally right! Strictly speaking, “Standard SIM” is actually incorrect terminology – as you say, the correct term to use is actually “Mini SIM”. The reason I’ve used “Standard SIM” in this article is to ensure consistency with the terminology used by UK networks (the ‘Mini SIM’ terminology is rarely-to-never used by UK networks). The other complication with using “Mini SIM” terminology is it’s easily confused with the newer “Micro SIM”. So for ease of understanding, this article refers to Standard SIM (2FF), Micro SIM (3FF) and Nano SIM (4FF). With regards to the full credit card-sized SIM card, it hasn’t been in use for over a decade (as such, we’ve neglected to mention them here on this page).

  12. wendy said:

    Ken,last week I bought a grade A refurbished unlocked Q10 from an online dealer in Glasgow-Freedom Mobiles;they have a very good reputation and I did a lot of research beforehand.

    Having ordered a new PAYG microsim for Blackberry from T-mobile,I found that the phone wouldn’t recognise it: it transpired that they had sent a nanosim by mistake.

    Staff at the local EE shop replaced it with a microsim and told me that activation could take up to 24 hours;this morning,having waited the requisite length of time I found ‘sim incompatible’ on the network page under settings.

    I took it back to EE and the main man told me that the phone was still locked to Vodaphone and then sent me to a local unlocking specialist.

    The process will take 24 hrs and cost £25;I’ve told the dealer about my difficulties and asked him to speak to the engineer doing the unlocking.The dealer tells me that he did carry out a thorough test of the Q10 before putting it on sale and is not convinced that unlocking is required.

    I’ve left it to him to talk to the engineer and to let me know what transpires later today.

    What advice can you give? At the moment,I’m looking at additional charges of £25 and have asked the dealer to defray the costs,as the phone is under 60 day warranty

    1. Ken Lo
      Ken replied:

      Hi Wendy,
      Thanks for your comment. I’m afraid I can’t give any specific advice in this situation – it really depends on if the BlackBerry Q10 has actually been unlocked. If it transpires that an unlock is required, you can of course complain to the retailer you bought the handset from (the phone wasn’t sold as described in the advert). If it’s found out that the phone has been unlocked all this time, I would suggest trying a SIM card from another mobile network (this would allow you to determine if there’s a problem with the handset or a problem with the SIM card).
      Hope this helps!

      1. wendy replied:

        Thanks for the advice Ken;I’ve just collected the phone from the engineer:it was locked and so I have sent copies of the work and payment receipts to the vendor-together with an angry email-and requested prompt reimbursement of the costs incurred.

  13. Andreas said:

    I have a lumia 520 ,can I put this sim in a iPhone 5s?

    1. Ken Lo
      Ken replied:

      Hi Andreas,

      Thanks for your comment! The Lumia 520 uses Micro SIM whereas the iPhone 5s uses Nano SIM. In order to use your SIM card in the iPhone, you’ll first need to get it exchanged for a nano-sized SIM.

      Hope this helps!


  14. Maggie said:

    I have a simple phone, not a smartphone. Do your comments only refer to smartphones? My phone is an Alcatel OT-E227 Pay-As-You-Go on Orange. Does that mean I order a Combi-Sim from EE?

    1. Ken Lo
      Ken replied:

      Hi Maggie,

      Thanks for your comment! Like most other featurephones, the Alcatel OT-E227 uses the standard-size SIM card. So yes, you’ll need to order a Combi SIM from EE. Please be aware: the Alcatel OT-E227 is a 2G-only phone and lacks support for accessing the internet. Hence, rather than ordering the comparatively expensive 4G SIM card from EE, you’d be better off choosing a cheaper network. For instance, giffgaff (get a free SIM card via this link) is a cheaper network working on 2G and 3G. Their prices are much lower compared to EE.

      Hope this helps!


  15. Helen said:


    I have a Motorola X8 phone. The sim card slot is missed. It doesn’t work after I directly insert an activated ATT SIM card in it (without the slot).

    Do you know if it should work or how to fix it?


    1. Ken Lo
      Ken replied:

      Hi Helen,
      Thanks for your comment! Can you clarify which phone you have? I think the Motorola X8 is simply the name of the processor… rather than the name of the phone itself! In the US, some phones lack a SIM card slot as they use CDMA technology (no SIM card is required). I believe AT&T is a GSM network so you’ll need a handset compatible with GSM on AT&T’s bands. You’ll also need a SIM card of the right size.

  16. Mark A said:

    I also got completely done over by Virgin recently. They supplied a Nokia 520 as an upgrade; I inserted the nano SIM in the adapter, it didn’t work, but it did take off the pins on the way out. I now face a 70 pound excess to claim on the insurance, or a 90 pound cost to replace the phone myself, or just 2 years waiting in expensive silence for the contract to expire. Nano SIMs don’t work, they are not suitable for anyone with less than perfect co-ordination and eyesight (i.e., over 40?) and other providers supply the right SIIM with their phones without any messing about. This one ranks up there with Virgin deleting my email account without warning, as a reward for changing to Cable.

    Thanks Virgin.

  17. Jason Bourne said:

    Hello Ken.

    Just an update to my comment 13th Jan. I found a few days ago, they confirmed my suspicion, the “combi” sim is incompatible with my N8 and also a number of other Nokia smart phones, its possible that this sim may also be incompatible with many other makes of phone, owners should check with their manufacturers.
    The problem I believe is that the mini, micro and nano sim metal contact pad is 39% smaller than the standard sim metal contact pad, the number and position of the segments differ as may the connections to the chip.
    I am preparing a letter of formal complaint to Asda CEO as I am not receiving any help from their mobile phone department regards no data connection to my N8.


  18. Jason Bourne said:

    Hello Ken, how confusing and annoying are sim card sizes. I use a 2yr eight month old Nokia N8, it has been working perfectly during that time using asda mobile (vodafone) then they announce they will be moving to EE.

    I sent off for the appropiate sim to eventually receive four. I inserted the first one, applied the seemingly lacking settings to find internet e-mails and maps won’t connect. To my disbelief trying the card in my ancient Sony Ericson K800i it connected to the internet. I tried all four cards with the same result.

    I compared the original working sim to the sims sent me by asda to find the original sim metal connection pad measuring at 14.5mm long by 11mm wide, I understand this to be 2FF, but the “new” sim metal contact pad measuring 11mm long by 8mm wide which I believe to be 3FF, is it possible that the N8 is incompatible with the later sims. Has anyone else found this problem, is there a cure?


  19. Noz said:

    Orange have just transferred my old sim card details to micro sim for new Xperia M. When I set the sim lock lock will my previous sim password still be active? Appreciate any help on this. Thanks.

    1. Ken Lo
      Ken replied:

      Hi Noz,
      Great question! The SIM lock (or SIM PIN code) will be stored on the SIM card itself. It protects the information stored on the SIM card. If you’re transferring to a new Micro SIM, the SIM PIN will not be copied over. If you like, you can set up a new PIN code after receiving the Micro SIM.
      Hope this helps!

  20. Sukhdev said:

    which micro sim fits the Nexus5 phone for T-Mobile ?

    1. Ken Lo
      Ken replied:

      Hi Sukhdev,

      Thanks for your comment. The LG Nexus 5 requires a Micro SIM card (both the international versions and the US versions of the phone). Assuming you’re talking about T-Mobile USA, see this article for more information.

      Hope this helps!


  21. Jordan said:

    Im looking at a Blu vivo 4.3 D910a. Android jelly bean. 4.1.2. ASIN:BooCUQDUB.
    Hope u can help.

  22. Boyd said:

    I have just been supplied a nano sim for a gallaxy s3 . the adaptor has wrecked the phone and it will no longer read any sim !
    Virgin mobile now want to charge ME £100 to fix it !!!! and a 5 day turn around ,

    Avoid at all costs insist on the correct sim for the phone

  23. Yasuro said:

    Hi, Ken. Thanks for the informative article.

    I have a question about the following statement towards the end of it:

    > Adapters are known to cause problems in certain devices: in particular in the Nokia N8, BlackBerry Bold 9700, Sony Ericsson X10 and Samsung Galaxy Note. Using a SIM adapter in one of these devices could damage the SIM card slot.

    I have a SE X10 mini (E10i). It is close to 3 years old but it still works fine with a customized ROM. Currently I am trying to have it recognize the nano SIM card that I inserted with an nano-to-standard (or 4FF-to-2FF if you want to be technically precise) adapter, to no avail. The SIM card slot is not damaged in any way; it can still recognize “stardard” (2FF) SIM cards in a stable fashion.

    Do you have any idea why it cannot recognize the nano SIM card? I am clueless and any help would be much appreciated.



    1. Ken Lo
      Ken replied:

      Hi Yasuro,

      One thing you should check is to make sure the Nano SIM actually makes contact with the SIM card reader. A Nano SIM (4FF) is 0.67mm thick whereas a Standard SIM (2FF) is 0.76mm thick. Depending on whether your adapter adds the extra thickness, it’s possible that the SIM will be loose and wouldn’t make contact with the reader.


  24. DrJolly said:

    Type of sim used by Motorola Razr i please

    1. Ken Lo
      Ken replied:

      Hi DrJolly,

      There are various devices in the RAZR family, though I believe you’re referring to this one? If so, your RAZR will need a Micro SIM card.

      Hope this helps!


  25. gayle harding said:

    Which micro sd card fits a huawei tablet?

  26. Cassandra said:

    What size sim does a A7100 android smartphone use ?

  27. E Hudson said:

    I have a Samsung Galaxy S3 Mini and the sim card is a micro sim. I chaged from a Nokia 7230 and the sim card could not be switched. Your guide says S3mini is a standard sim. I am on Vodafone PAYG.

    1. Ken Lo
      Ken replied:

      Hi E Hudson,

      As far as I'm aware (and I have double-checked this issue!), the normal Galaxy S3 uses Micro SIM whereas the Galaxy S3 Mini uses Standard SIM. Could you kindly double check your handset's model and verify that it's a Galaxy S3 Mini?

      Many thanks,


  28. Felim Doyle said:

    What does it mean by “standard”, full size (credit card size) or mini? Sizes are: full (1FF), mini (2FF), micro (3FF), nano (4FF). I still have some working phones that take a full size card or a mini-SIM with an adapter!

    The term “standard” is ambiguous and incorrect. Soon, one of the smaller sizes will become “standard” although, personally, mini-SIM is about the most practical size.

    1. Ken Lo
      Ken replied:

      Hi Felim,

      Thanks for the comment! You make a really good point here – I'm simplifying the terminology here to match up with what is used by the mobile operators (they almost always refer to 2FF as a Standard SIM rather than a Mini SIM). I think partly this is due to consumers finding the terms "Mini" and "Micro" easy to get muddled… also the majority of phones since 2G have used 2FF Mini-SIM cards.

      I'm personally a fan of 2FF SIMs too, and I struggle to see why we need 3FF and 4FF (not sure it really saves a significant amount of space within the phone). Also the introduction of 3FF and 4FF has caused all kinds of new issues with SIM cutting and SIM adapters – this can sometimes be a real headache for consumers.


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