Why does my AT phone say invalid SIM card?

Why does my AT phone say invalid SIM card?

This can occur if the SIM card isn’t seated correctly. A quick fix is to try removing and reinserting the SIM from the device; you can see how to do this by using our Device Support Tool. Once there, choose your device and go to About your device > Insert SIM card.

How do you fix an invalid SIM card on an iPhone?

  1. How to troubleshoot your iPhone and SIM card connection.
  2. Physically remove and reinsert the SIM card.
  3. Put your iPhone in Airplane Mode.
  4. Turn your phone off and on again.
  5. Check for carrier updates.
  6. Update your iOS software.
  7. Reset your network settings.

What does it mean when my iPhone says invalid SIM?

The iPhone may issue the “Invalid SIM” error because of a software issue. Meaning, the SIM card may be wrongly placed, or the SIM card needs to be replaced by the wireless carrier.

Does iPhone 3GS have a SIM card?

iPhone 3 SIM cards Press a paperclip, pin or the SIM-ejection tool supplied with the iPhone 3GS into the hole next to the SIM card tray. You can now insert or swap the SIM card. Slide the SIM tray firmly back into the iPhone 3GS.

How do you fix an invalid SIM?

The steps are discussed in detail for Android and iOS.

  1. Reboot Your Device.
  2. Re-Insert SIM Card.
  3. Switch to Supported Network Operator.
  4. Reset Network Settings.
  5. Switch Airplane Mode On and Off.
  6. Activate Safe Mode.
  7. Update Software.
  8. Factory Reset.

Why does my SIM card keep disconnecting?

Dropping your phone is a common practice, but even if it didn’t suffer any damage, the SIM card could have moved out of place. A cheap and unique method many have tried is adding some paper or even tape to get a tighter fit. That usually makes the SIM card fit nice and tight and resolves the problem.

Why do I have an invalid SIM?

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. Update your iPhone or iPad to the latest version of iOS. Make sure that the SIM tray closes completely and isn’t loose.

Does invalid SIM mean phone is locked?

Invalid SIM means that the phone is locked to a carrier, and the SIM card isn’t for that carrier. SIM card locked means that you need a PUK code to unlock it. So call your carrier and ask for your PUK code.

Why is my phone not recognizing my SIM card?

Open Settings > Mobile Network. Under SIM Card info and Settings, Tap the SIM, and toggle on “Enable”. Also, make sure the data roaming is ON to avoid this issue when you’re in a roaming area. When you face the issue of “SIM Card not detected”, clearing out cache data could prove an effective solution.

What to do if your iPhone says SIM card is invalid?

Make sure the SIM card is not scratched or otherwise damaged. If your iPhone’s SIM card is not properly inserted into its slot, it’s not going to work properly in the phone. Remove the SIM card using a SIM card removal tool or a paperclip, then reinsert it into the phone, ensuring it’s in the tray properly.

Where is the SIM card located on an iPhone 3G?

On most iPhones, the SIM card tray is located on the right edge of your iPhone. On the earliest iPhones (original iPhone, 3G, and 3GS), the SIM card tray is located on the very top of the iPhone.

What to do if you cant activate your iPhone?

Go to Settings > General > About. If an update is available, you’ll see a prompt to select OK or Update. Remove your SIM card from the SIM card tray and then put the SIM card back. Make sure that the SIM tray closes completely and isn’t loose.

What happens when your sim card isn’t recognized?

When the SIM card isn’t recognized, the phone can’t send or receive calls or texts or connect to the internet via cellular service. But don’t panic, your iPhone’s cellular days probably aren’t over — in fact, you can likely troubleshoot the SIM card issue yourself in just a few minutes.