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      • If you get an alert that says Invalid SIM or No SIM Card installed, follow these steps. Make sure that you have an active plan with your wireless carrier. If your iPhone is locked to a carrier, it can be used only by that carrier. To check if your iPhone is unlocked, go to Settings > General > About.
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  2. Sep 16, 2024 · If you get an alert that says Invalid SIM or No SIM Card installed, follow these steps. Make sure that you have an active plan with your wireless carrier. If your iPhone is locked to a carrier, it can be used only by that carrier.

  3. Nov 12, 2021 · If your iPhone says Invalid SIM, you’re experiencing an issue with your iPhone specifically. If the problem went away after you inserted a different SIM card, then there’s a problem with your SIM card, not your iPhone.

  4. Oct 29, 2019 · There are many reasons your iPhone might say its SIM card is "invalid," or not properly recognized, from a needed update to a card that has been physically jostled out of position.

    • Apple
    • Henry Blodget
    • SIM Card. Your SIM card is actually a small computer chip embedded into plastic so it can be transferred easily across devices. Although they are resilient, they can become faulty, or may not be compatible with the phone you’ve transferred it into.
    • Phone is Carrier Locked. Especially in the US, where the cost of a cell phone is often paid off in installments, service providers implement locks to prevent you from utilizing your equipment with competitors.
    • Software Bug. Occasionally, incompatible or corrupted software can cause network issues with an iPhone. It is infrequent, but worth ruling out before embarking on deeper level hardware fixes.
    • Faulty SIM slot. This occurs most frequently on newer models of iPhone. Beginning with the iPhone XR, some models feature a Apple iPhone Parts. On previous models, the slot is soldered onto the logic board.
  5. Aug 22, 2024 · Why does my iPhone say “No SIM” or “Invalid SIM”? If you see “Invalid SIM” or “no SIM” on your iPhone, it indicates the SIM card or its firmware is malfunctioning and cant connect to its carrier as a result.

    • Editor
  6. Apr 4, 2021 · What to Do If Your iPhone Suddenly Displays 'SIM Failure,' 'No SIM Card Installed,' or 'Invalid SIM'? This guide provides in-depth instructions on how to resolve it.

  7. Jan 2, 2023 · If you have an iPhone that uses a physical SIM card, either of the two aforementioned errors can be the result of a damaged or defective SIM card, or issues with the slot on the phone...

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