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  2. Jan 11, 2024 · If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad. 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. Restart your iPhone or iPad. Check for a carrier settings update. Go to Settings > General > About.

  3. Apr 15, 2024 · Perform a network reset and/or a factory reset. How to Fix Invalid SIM Errors. Download Article. 1. Restart your iPhone or iPad. If your device claims your SIM card is invalid, a quick restart will often fix the problem—especially if the error appeared suddenly. 2. Remove and reinsert your SIM card.

  4. Oct 29, 2019 · 1. Once your iPhone is unlocked, swipe up from the bottom of the screen. 2. In the upper-left corner tap the Airplane Mode icon that looks like a circle with a white airplane in the middle....

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  5. Nov 12, 2021 · Swipe the red power icon from left to right to shut down your iPhone. Wait a few seconds, then press and hold down the power button or side button to turn your iPhone back on. Update Your iPhone. Your iPhone could also be saying Invalid SIM because it’s software is out of date.

  6. Apr 29, 2024 · How to fix an invalid SIM problem on your iPhone. 1. Ensure the SIM card is active. If the SIM card you’ve just inserted into your iPhone has been inactive for more than a few months now, the carrier may have deactivated services for the SIM temporarily or permanently, depending on their terms and conditions.

  7. Nov 30, 2021 · Sometimes the solution is incredibly simple, such as a software bug fixed by restarting your device or cleaning dust off of your SIM card. We'll cover the top solutions to get the SIM card on your iPhone or iPad working again. Jump To: Common Issues: Why Does My iPhone Keep Saying No SIM? Common Fixes: SIM Card Not Working on iPhone or iPad.

  8. Sep 5, 2023 · First Steps. Before undertaking any of the more involved solutions below, here are a few quick fixes to get you started. Restart your phone. This can clear any minor software hiccups. Update your OS. You can check for new versions under Settings > General >Software Update. Check for a carrier settings update.