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  1. electronics.stackexchange.com › questions › 24314basic - How does this SIM card reader circuit work ...

    2. The circuit for a SIM card reader is shown here. The circuit uses a CMOS hex inverter and other simple components; yet, not only does it work but it can also communicate with a PC via serial port! I am learning electronic circuits as a hobby and I was baffled to see how simple this was. I was thinking of using some kind of micro controller ...

  2. forums.crackberry.com › blackberry-key2-f472BlackBerry key2 not reading simcard - BlackBerry Forums at ...

    Oct 2, 2019 · I did a factory reset and tried multiple sim cards and nothing works. I contacted Blackberry but because I bought it on Amazon.com from a 3rd party seller they are telling me that it was a "non authorized seller" and the phone is "not authorized for sale in my region" so they will not warranty it.

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  4. electronics.stackexchange.com › questions › 35424arm - Electrical reset to a SIM card - Electrical Engineering ...

    After applying power to the SIM card you must first supply a clock to the clk pin. Use something in the 3-3.5MHz range. Then pull the reset pin of the SIM card low for about 100ms, drive the reset pin high again, and listen to the I/O line for the ATR.

  5. www.hovatek.com › blog › how-to-fix-a-blackberryHow to fix a Blackberry that won’t detect SIM Cards or signal

    Aug 15, 2022 · How do I fix a Blackberry that won’t detect SIM Cards or signal? Here are a number of fixes: Ensure the SIM is properly inserted; Test the SIM card on another device to be sure its still active and in good condition; Remove dust, rust or any foreign material inside the SIM slot

  6. www.wikihow.com › Reset-a-BlackBerry3 Ways to Reset a BlackBerry - wikiHow

    Oct 25, 2022 · To perform a hard reset, remove the battery for a few seconds and then reinsert. For a soft reset, press and hold the Alt, Right-Shift, and Backspace/Delete keys. To restore your Blackberry to its original factory settings, go to Options > Security Settings > Security Wipe.

  7. www.ifixit.com › Guide › Blackberry+Curve+8320+SIMBlackberry Curve 8320 SIM Card Replacement - iFixit

    Go to step 1. The guide will show you how to: Remove the battery. Replace the SIM card. Step 1 Battery. Hold the phone with the back facing you. Press the silver tab down and remove the cover. Add a comment. Step 2. Pull up on the top edge of the battery to remove it. Add a comment. Step 3 SIM Card.

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  9. cellphoneforums.net › rim-blackberry › t309876-oldold Sim Card in BlackBerry 8100 - Cell Phone Forums

    Mar 19, 2010 · I have a new bb8100, and I used my old sim card in it, but I am wondering why I can't read the contacts from my old sim card? Any idea how to open up my old contacts in the address book of my new BlackBerry? i