Coil on Module (CoM) Payment Conversion

Hey everybody. This is just a pre-public draft of a thread I will be posting about the new CoM conversion service. Feel free to post any feedback about the thread so I can make it easier to understand. @amal check this out and let me know if you want anything changed.

Please only post direct questions about the CoM conversion service, the name and location of banks that you can confirm have CoM cards, and any pictures of modules you suspect are CoM in this thread.


In this thread I’ll describe how you can go about using the Payment Conversion service offered by Dangerous Things to convert a specific kind of credit card into a payment implant. The cards use a technology called Coil on Module (CoM). The contact interface of these cards is a self contained unit which you can remove from the card, send to Dangerous Things, and have converted for a fee. The implant will be encapsulated in biopolymer, packaged, sterilized, and returned to you ready for implantation.

You can use a credit or debit card from your bank if they use CoM cards, or open a new account with an bank that uses this type of card. Because the chips used come from standard cards, they usually have an expiration date. It may be helpful to acquire a new card from your bank to refresh the expiration date and get the most use out of your new implant. Not all cards use Coil on Module, so it will be your responsibility to identify and remove the module from your card before sending it in to be converted.

Identifying a Coil on Module Card

Several different versions of the CoM are currently in use depending on your card issuer and locality. Here are some common examples:


The key element that identifies most Coil on Module chips is the small trace usually found at the bottom of one of the center-right contacts. This is part of the tiny antenna found on the underside of the module. If you’re not certain whether your card is CoM, feel free to post a picture of it in this thread.

Another way to check is to shine a bright light through the back of a card and see if you can spot the antenna traces.

Methods to Remove the Module from your Card

The Coil on Module was laminated into the PVC of the card during manufacturing, but it is in fact a standalone flex PCB which can be removed without much difficulty.

One method is to use acetone to partially dissolve the card until it has de-laminated to the point that the CoM can be pulled loose.

  • Make sure to do this outdoors or in a well ventilated area.
  • The acetone can be purchased from a pharmacy, beauty product, or home improvement store. You will likely want 90% or greater concentration acetone to speed up the process
  • Use a glass or tray or jar, do not use a plastic container
  • Avoid contact with your skin and eyes
  • Place the card in the container, and pour in just enough acetone to cover the card. Do not seal the container completely, but you can partially cover it
  • Wait ~15 minutes and check on the card. Some are made of hardier materials than others, so they may require more time. You may need to top-up the acetone a few times as it evaporates
  • After the card has begun to de-laminate, you can begin poking at it with metal tools. Try not damage the CoM itself, but the rest of the card can be destroyed
  • Once enough material has been removed, the CoM should come loose relatively easily
  • Leave the CoM on a napkin or paper towel so that all the acetone can evaporate away

Another method is to use a device like a hair straightener to heat the area of the card around the CoM enough that it can be popped out. I would avoid exceeding 200°C so you do not damage the electronics. After a few seconds of heating, the card should be soft enough to bend and pry the CoM loose. Be careful using metal tools, as you may damage the antenna traces on the underside.

Ordering the Conversion from Dangerous Things

This is the “special conversion service link” [Amal will be sharing with me soon] to order your CoM conversion. If you are uncertain about anything, please post your questions here before ordering. Once you have your CoM in hand and have paid for the conversion, you can ship it to Dangerous Things using the information provided in your order confirmation email. The CoM modules are very difficult to read alone without a larger repeater antenna (like the ones found in the original cards and used in the conversion process), so you should not have to worry about someone skimming your card details in the post.

Looks pretty good! My one bit of advice would be if there is a type that is more common in a certain area mention that under the pic. Like all of my US based credit cards look like the one kind so say that’s more common in the US, Makes it easier for people.

Yeah you’re right, I just don’t have enough data. I’ve only heard from like 4 people about their experiences with CoM. I’m hoping if it becomes more popular we’ll get more data

We Must Construct Additional Polls
  • I am interested in a CoM conversion
  • I know someone who is interested
  • I know a bank that uses CoM
  • I have no idea what this is about
  • #whitegang
  • #bluegang
  • #greengang
  • #redgang
  • #rgborbust

0 voters

Noooooooo, #rgborbust is best lol (says the person with one red + two blue implants)

Want me to put my CoM data in here for any Aussie people?

Sure. If anybody posts stuff here while we’re getting set up and I think it’s really valuable I’ll ask you to crosspost in the real thread

Australian(ish) banks CoM status -

Commonwealth Bank (Commbank):
Debit mastercards from 2018 onwards should be CoM - my 2018-2021 card is larger CoM, my 2021-2024 card is the smaller CoM format

Mastercard gold credit card appears to be CoM, unfortunately I no longer have the physical card to confirm

Two Debit cards from 03/22 expiring 07/26 were not CoM, unsure of current status of newer cards
Yes, I was / am one of those people, don’t use it much anymore but the VISA card is CoM

1 Like

Two examples from Discover


Just wondering if a libray may be a good quick look up


eventually it will have MOST availiable chip types.

Just a thought, and here are some more for you if you wanted them


I still have to roust Amal to take a look at this. He’s got to make the product page.

ok i will make a video using the data posted to this point… but i need more;

  1. show some pictures of the back side of the module with the coil
  2. post pics of the COM conversion with the module in place on your adapter (or i can take pics and vids when they arrive)
  3. confirm that only COM cards have the little via / jumper / thingy things for the contactless wirebonds to get out to the edges of the module, and non-COM cards do not have those. If that’s the case, then I can explain exactly what to look for on the surface of your contact interface to determine if it’s COM or not. the one confusing one is this one…

… is that COM or not? If not, then I think we can safely identify COM vs non-COM without building a giant database of images.


I’ve seen dozens of card configurations from all over the world and I’ve only seen the little traces on CoM cards. That’s not conclusive, but it’s the best I’ve got.

I don’t think that picture you asked about is CoM, but I’d be interested to hear about pilgrim’s experience with it


That Chip is on my Air New Zealand travel card, it is a multipurpose, but the chip is for tap and pay because it is also Pre-pay debit card you can load foreign currencies on it.
It has as Mag Stripe also

I’m guessing this is the info that you may be after

I can PM you with more info if you need it.

Air NZ OneSmart


My guess is AirNZ OneSmart may not be popular for conversion

But also my guess is this card type could be generic

I’m willing to send this for destructive testing if you want it

Thanks for the info. I don’t see any evidence that this card is CoM. Can you see an antenna underneath the contact interface when you shine a bright light through the card?

as far as we know there is no indication on the chip itself that is accessible with taginfo or otherwise that would indicate it is a coil-on-module design. that said, the fact it’s infineon (they patented CoM) is a good sign… but still could be just a regular wirebond card design.

That’s best I can do for now, BUT I can get all destructive up in this bitch if required

it kinda looks like it might be actually…

the antenna part inside looks a bit different though

Yeah that little hanger makes me think it’s a regular card, where the antenna was cut by a machine after wire bonding