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Description: This is a full 8-pin breakout for the SIM socket allowing direct access to SIM communication.

Note: This breakout board was originally designed for a SIM socket with a switch for card detection. We have since switched to a socket that does not have this feature so the SW1 and SW2 pins have nothing to break out and can be considered NC. The 6 SIM card pins, however, are still broken out correctly.

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Customer Comments

  • The SIM sockets you sell are 6 pin, but the board picture here is 8 pin and apparently not the same model (despite saying 6-pin in the description)? Are you using different SIM sockets for these two products?

    • admitting this is a very overdue reply, the 8 pin breakout board includes 2 switches added by sparkfun, which can be used to “detect” when or if a sim card has been inserted, telling your micro-controller to begin sim card communications.

  • Hi! Can I get eagle footprint of this breakout like in other breakout boards?

  • Very good morning to all of you I have the following question: Where is connected SW1 and SW2 pins in my GSM / GPRS SM5100B-D model?

    Thank you for your service.It is excellent!

  • And I have another question. I bought the GSM / GPRS Module SM5100B-D model. Notice in the Datasheet that a connection whose name SIM_DET. SIM_DET connector must be connected to SW1?

  • Sparkfun Hello, I would like to know what are the dimensions of the SIM Card. And that distance is between Pad’s. I’d be very grateful for this information.

  • Anyone know where to find a SIM Card Breakout. The difference being it’s a little simcard with wire extension. I want to use the board here at sparkfun to create a sim card extension cable. I haven’t had much success finding one.

  • Does anyone know of information on talking a SIM card and using the network? I am using it in a project to remotely control my device via text messages such as a text with 1:ON means turn on my output 1 and I would get a message back that message was received and output is on. There are actual devices for this from Automation MFR’s like wago.us but I want to make my own. :)

    • There are a bunch of commands for talking with SIM cards, but as for using a cellular network, you’re going to need more than just a card to get it working. SIM cards have a bunch of authentication mechanisms, including computation of encryption keys (one command, called “Get Challenge” involves calculating security codes from a 64-bit number) and also communication to and from the local cell towers.

      You’re better off using a dedicated cellular board, or picking up an old cell phone that has a SIM socket and isn’t SIM-locked to its original carrier. Many Nokia phones have a serial port (called F-bus) and there are (some) articles on commands that can be used to send and receive text messages.

  • I need to know if it includes a SIM socket. Cmon sparkfun, please improve your descriptions. They are lacking.

    • If it didn’t include the SIM socket, we’d be very clear about that. But it does, just as all the above pictures indicate.

  • When is a Micro Sim Version of this coming out? or a Micro SIM breakout board in general would be nice =)

  • I noticed the breakout for this has SW1/SW2, how have you mechanically achieved this? I’m putting this part on my board without the breakout and would like to be able to tell when a SIM is plugged in. A schematic for the breakout would be great.

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