DIY Cutting a Micro SIM into a Nano SIM card for your new phone

how to cut a micro sim card to nano sim

You are probably here because you just got a new device on your hands. And after unboxing it and turning it on you discovered that your SIM card doesn’t fit inside the new slot! This actually just happened to me after upgrading to a Galaxy 6S Edge from my beloved Nexus 5. Been there, done that. I’m with you on this one.

It doesn’t matter wether you had an old phone with a regular-sized SIM card or a newer phone with Micro SIM – you can cut the SIM card to fit inside your new device in just a few minutes!

Disclaimer: Do it at your own risk. Trendblog takes no responsibility to any damage to the SIM card and/or phone.

Having said that, it’s actually quite easy to do if you follow the guide below.

What you will need:

  1. Your SIM card
  2. A cutting template (you have to print it yourself)
  3. Kitchen knife or good scissors


  1. Tape  (chewing gum will also do the trick)
  2. Sand paper or nail file

SIM card cutting template

Cutting a SIM card without a template might lead to you destroying it, so don’t do that unless you have a SIM card cutter. First things first, go ahead and download a template, which the guys over at GoSoftWorks prepared for you.

When printing the cutting guide, make sure to NOT check the option “Fit to page” or any other setting that might change the size of the original document for printing.

How to cut a Micro SIM card to Nano SIM

  1. Align your SIM card with the template, contacts up
    • Secure it in place with tape or a piece of chewing gum (yup, it works too)
    • If the SIM card is bigger or smaller than the template – print it again with different settings. This is crucial to making the right cuts.
  2. Align your kitchen knife with the guides and press down on the SIM card to make markers for later
    • Start with the 45 degree angle cut (bottom right edge)
  3. Complete the cuts with a heavy kitchen knife or good scissors


Only attempt to cut the SIM card with very good scissors, otherwise you might break it. My preferred method is using a Chef’s Knife, placing it on the markers (from Step 2) and gradually increasing the pressure to make a clean cut. Repeat that 5 times and you will end up with your almost finished Nano SIM card.

Remember: it’s always better to cut off less. Don’t try to be super precise if you fear destroying your card. Cut just a tiny bit less off than you actually need to, you can always sand the edges later for the perfect fit. If you need to sand down your new Nano SIM to make it fit, only sand the edges. Don’t sand the gold contact!

Some SIM card’s gold contact will be larger than others. This means that some of you will actually need to cut a part of the gold contact to make the SIM card fit into the new slot. Don’t worry though. Just follow the guides from the template and your SIM card will be just fine. If your SIM card happens to have a larger than usual gold contact and you’re afraid of cutting it – just do it. Your card will work just like it’s supposed to.

SIM Card Dimensions

There are three standards of SIM cards that are commonly used in phones: Mini-SIM (we know it as the “regular” SIM card), Micro-SIM and Nano-SIM.

  • Mini-SIM – 25 mm x 15 mm x 0.76 mm (height x width x depth)
  • Micro-SIM – 15 mm x 12 mm x 0.76 mm
  • Nano-SIM – 12.3 mm x 8.8 mm x 0.67 mm

As you can see, Nano-SIM cards are slightly thinner than Mini- and Micro SIMs. Nevertheless, even if you cut a Micro-SIM to fit into a Nano-SIM tray, you should be just fine.

Which SIM card fits into your device?

Not sure which kind of SIM you need to use? Here’s a list of popular devices and which SIM cards you need to have.

  • iPhone 4 & 4S – Micro SIM
  • iPhone 5, 5S, 6, 6S (also all Plus models) – Nano SIM
  • LG Nexus 4 & 5 – Micro SIM
  • LG G X – Micro SIM
  • Samsung Galaxy A3, A5 & A7 – Nano SIM
  • Samsung Galaxy S3, S4, S5 – Micro SIM
  • Samsung Galaxy S6 (edge) – Nano SIM
  • Sony Xperia E3, E4, M, M2, S, T, Z, Z1, Z2 – Micro SIM
  • Sony Xperia Z3 – Nano SIM
Daniel's passion is optimizing stuff, making it work better and faster. He likes tech, entrepreneurship and the outdoors. You can find him on Google+ and Twitter. Online Marketer | Entrepreneur | Hard Worker | Smart Thinker | Techie
  • Jc Reyes Garcia

    I have a nexus 5 currently and 2 weeks from now to get my s6 edge also, how do you find the upgrade to s6 edge from nexus phone?

    • Daniel_Bulygin

      I’m glad I upgraded. The SGS6 is one of the best Android phones on the market right now. However, you need to get used how the S6 Edge feels in your hand. And, to be honest, I don’t think that the extra $100 are worth it, simply for the reason that it’s uncomfortable to hold it + the curved screen is just a nice gimmick that you forget about after using the device for a week. If I could get my money back and buy a new phone, I’d go for the flat SGS6. Just my two cents.

      Once you go upgrade though, install Nova Launcher first if you want your homescreen to look somewhat close to stock Android.

      • Jc Reyes Garcia

        I see, thanks for your opinion, yeah its what i also think that the edge is just for the looks, every reviewer of s6 edge on youtube also say it, but since my father bought it for me i really dont have the right to complain, yeah ill probably use nova launcher since i got used to stock android. Thanks again!

  • Kate Irwin

    Absolutely Brilliant page, worked perfectly for me! was very nervous but it worked!

  • Surprisingly easy with a sharp, substantial knife. Glad I didn’t try scissors.

    • Swift John

      I used some really thin(bendy) new ones that were quite sharp.

  • jjet1

    Will try this tomorrow for the samsung S6. Fingers crossed I don’t mess up…

    • Kloud

      How’d it go?

      • Mister Wirez

        I gotta buy a new one… I had nothing to sand with, so I made one last cut screwed and it screwed me.

        Oh well, Mr Patience strikes again, the tedious small things are not for me. Another $15 dollars right in the crapper.. lol.

        • Swift John

          I just used sharp scissors no sanding, I understand what you mean though, I think I got lucky.

  • Claudia

    It worked wonders despite I was very nervous. I used sharp scissors and a nail file to remove the excess. Thanks for the posting and the template.
    I used it to cut a Micro into a Nano card for Nexus 5x.

  • Vipiñ R Nåir

    My sims chip is quite big.. So if I cut..the chip will also get cut in the sides..
    Will DAT damage my sim..? Please help me.. Thank u

    • Sandarpan Mukherjee

      Yes it will damage your SIM. Only attempt this with SIMs similar to the pictures shown above.

  • Erick Chavez

    I know that this article is old, but instead of scissors, I used nail clippers. Worked great!

    • DanielBulygin

      Thanks for the tip Erick! I would have thought that nail clippers wouldn’t work because of the curved blades. Did you end up with curved edges on your Nano SIM? Pics or didn’t happen! 😀

      • B J

        He may have used those meant mostly for toenails that generally have straight(ish) edges to the blades 🙂

  • Swift John

    Great, it worked thank you. I wasn’t too careful either.

  • Arielle

    Phew, so far so good this seems to have worked.

    Suggestion though, use an xacto knife. Much more precise than scissors and a chef knife, and a much sharper cut too. Make sure it’s a new blade.

    I used an xacto knife, metal ruler, and a sander for pencils and such.

  • Vedant Pratap Singh Jadon

    Is it more safe to use a SIM card cutter than knife and scissors? I think I would more confident using a cutter unless that could ruin my SIM even more. Thoughts?

  • Clayton

    The sim card is too thick to fit a nano slot even if it was cut down.

    • Magnetic_dud

      the difference in thickness is very minimal, less than an hair. You could sand it away very easily

  • Alvin Nivla

    Hi. Will the chip still still work even if there’s a small cut at the edges of the gold chip particularly at the corners as a result of “over sandpapering”?

  • Han

    Just did it with scissors.
    I had done it like twice in last 4 years.
    But this time I was cutting the gold part as I found it unusually big and thats why I ended up here. Read this article and then, confidently,
    I sanded the top and bottom edges with the file of my nailclippers. And.. it worked.
    Thanks. 🙂