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  2. Jul 15, 2022 · If you can't make a call or if you see an error message that your phone's SIM card is not working, there are several ways to troubleshoot the problem.

    • Henry Blodget
    • Symptom #1 Physical Damage. It’s obvious. If you find out that your SIM card is physically damaged, then you should be concerned. To check that out, you should remove the SIM card from your phone and see any physical damage.
    • Symptom #2 Network Issue. If you notice that there are network issues on your phone, this could be an indication as well. But the network issue should be frequent and persistent because your service provider might also have network issues in your area from time to time.
    • Symptom #3 Calls and Messages are being delayed or interrupted. If your SIM card is faulty, then you will notice that your calls are dropping all the time.
    • Symptom #4 Sound Quality is bad in Call. Another sign of a faulty SIM card is that you may experience bad sound quality while on call. For example, if you are on a call with someone and the SIM is damaged, then you will not hear from the other side clearly.
  3. Jan 22, 2024 · Experiencing an "Invalid SIM Card" message on your phone? Learn effective troubleshooting tips to resolve this issue and get your device back up and running.

  4. Jan 24, 2024 · Mobile Devices. What is an "Invalid SIM Card" Message? An "Invalid SIM Card" message is a common issue encountered by mobile device users. It occurs when the SIM (Subscriber Identity Module) card inserted in the device is not recognized or cannot be authenticated by the network.

  5. Mar 20, 2022 · Basic Troubleshooting. 1. Remove the SIM Card and Reinsert It. 2. Clean the SIM Card and SIM Card Tray. 3. Reboot Your Device. 4. Update Your Device. 5. Turn Airplane Mode On/Off. 6. Try a Different Device. 7. Contact Tech Support. 8. Is the SIM Card Active? Advanced Troubleshooting. 9. Reset Network Settings. 10. Update Carrier Settings. 11.

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  6. Jun 9, 2024 · One of the most obvious indicators is an error message on your screen, such as “Invalid SIM” or “No SIM card installed.” You might also notice a lack of network connectivity, with your phone unable to make or receive calls, send texts, or use mobile data.

  7. Jan 25, 2024 · Unrecognized SIM Card Error: Your mobile device may display an error message indicating that the inserted SIM card is unrecognized or invalid. This could be a clear sign that the SIM card is damaged or not functioning properly.

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