No SIM Card Installed
How-Tos & Tutorials

No SIM Card Installed – Understanding the Error for iPhone and Android


The modern generation is defined by the use and application of technology, with smartphones being at the forefront of this digital revolution. People around the world heavily depend on their mobile devices as it makes the aspect of communication easier. Therefore, experiencing a “No SIM Card Installed” error can be very frustrating as it hinders you from accessing the full potential of your smartphone.

SIM cards give mobile phones a distinct identity through which individuals can send and receive numerous calls and messages. Consequently, the pop-up message “No SIM card Installed” limits users from fulfilling their communication objectives. 

Limitations imposed due to the “No SIM Card Installed” error:

  • Inability to initiate phone calls.
  • Inability to send SMS and MMS.
  • Inability to access mobile data.

The error primarily surfaces when there are specific hardware or software-related issues. However, users can resolve this problem by incorporating standard troubleshooting measures that have been highlighted in the following sections.

The Meaning “No SIM Card Installed” Error

If you are facing problems concerning an invalid SIM on your iPhone, likely, that you have not inserted your SIM card properly. The notification for SIM failure iPhone conventionally appears when your mobile handset fails to read and recognise the presence of a SIM card.

Modern-day mobile phones need to be paired with a functional SIM card to effectively send and receive phone calls, text messages, and access mobile data. Therefore, the “No SIM Card Installed” error directly indicates a SIM card issue compelling the user to incorporate relevant fixes to find immediate solutions.

Related Article: How to Fix SIM Card Inserted but No Service on iPhones – Error Resolved

The Causes of the Error

The Invalid SIM on Android error is a common issue faced by mobile phone users worldwide. The error prevents users from connecting with a mobile network, in turn, disabling calling and texting amenities. Here are some of the foremost causes that lead to this error:

A. Damaged SIM card or SIM tray

Mobile phones are susceptible to physical damage especially if you have been using a handset for an extended period. Users must, therefore, eject the SIM card and examine the microchip along with the SIM tray to check for physical damages.

The only possible solution to physical wear and tear is to replace the IC chip by connecting with the carrier network concerned. The issue may also surface when a SIM is not inserted adequately. Adjust and reposition the SIM to verify if it’s still functional.

B. Software and SIM Compatibility Issues

Mobile devices often fail to recognise SIM cards due to various software problems. Users must update network settings manually to resolve the error. People working with a locked mobile phone may also experience such complications. 

This is primarily because locked phones are only compatible with a specific carrier SIM card. Inserting a new SIM card originating from a foreign carrier network may lead to this issue. Consult with your carrier network to verify the locked status of your handset.

C. Internal Carrier and SIM Deactivation Issues

Internal carrier disputes and network restrictions can often cause SIM failure iPhone. General users may face such complications in remote locations or while traveling outside the carrier coverage map. Moreover, carrier companies may also choose to deactivate SIM cards that have not been in use for an extended period, leading to the “No SIM Card Installed” error.

Effective Solutions

The No SIM card installed keeps popping up iPhone! Implement these basic troubleshooting measures to find relevant solutions:

A. Reinsert SIM

Reinserting and adjusting the SIM card should be the first step that people facing the “No SIM Card Installed” error must consider. Smartphone users now operate with physical and eSIM cards according to their convenience.

Physical SIM Cards

To effectively reinsert physical SIM cards, ensure to follow these steps:

  • Step 1: Use the SIM eject pin to open the card tray on your device. Push the pin firmly so that the SIM tray pops out.
  • Step 2: Remove the SIM card from the slot after pulling out the tray. Examine the SIM card for physical damages and then readjust by ensuring that the card fits the tray boundaries perfectly.
  • Step 3: Carefully insert the tray into the device and reboot to verify.

Upon inspection, if any physical damages are identified, then it is recommended to opt for a complete SIM replacement. Users can incorporate number porting solutions to retain the original phone number while replacing the SIM card.

eSIM Cards

When it comes to eSIM cards, most of the contemporary mobile devices have embedded technologies that support the system. The eSIM card authentication information is communicated to the carrier network by using internet amenities. Users must install a carrier-based mobile application or scan a QR code to activate the eSIM.

However, the use of eSIM cards is comparatively different from physical SIM cards as they cannot be reinstalled. Removing an eSIM causes consequent issues that disallow the user from downloading the provisions again. Individuals may choose to disable eSIM services for a specific timeframe to find solutions concerning the “No SIM Card Installed” error.

Interesting Read: From Physical to eSIM: Know all about iPhone SIM Cards

B. Reboot your Device

Rebooting your mobile device often takes care of most abnormal software issues. It is a common practice that must be acknowledged by all users to experience enhanced smartphone performance.

Rebooting iPhone

  • Press and hold the Power and any Volume buttons until the pop-up slider appears on the screen.
  • Swipe the slider down to switch off the device.
  • Press and hold the Power button after waiting for a few minutes to reboot the device.
  • Users may also switch off iPhones by navigating to the primary setting menu, selecting the “General” option, and tapping on “Shut Down.”

Rebooting Android Phone

  • Rebooting Android phones is comparatively easy. Users must tap and hold the primary power button until the reboot menu appears.
  • Tap on the “Reboot” option and confirm.
  • Your phone should automatically restart after a few seconds.

C. Clean your SIM card and Slot

A dirty SIM card or SIM tray may cause issues in connecting with mobile networks. The most preferred technique for cleaning SIM cards is by using cotton swabs with an alcohol solution. Ensure to clean the gold region of the SIM card without allowing any of the alcohol solution to enter the mobile device.

D. Check if Your Mobile Account is Active

General customers are assigned specific carrier accounts that allow them to make payments, keep track of carrier offers, and communicate with the carrier support team effectively. These accounts play a vital role in ensuring that the services offered by the carrier network are reaching the final user.

Talk Home Mobile users can implement the following measures to verify and activate their mobile accounts:

  • Step 1: Navigate to the primary page of Talk Home Mobile.
  • Step 2: Users must now input their respective user email ID and password to log in.
  • Step 3: After logging in, scroll down to the bottom of the page and click on the “My Talk Home” option.
  • Step 4: Navigate through the menu to verify the account’s active status.

E. Reset Network Settings

Manually updating network settings can help resolve the “No SIM Card Installed” error. However, before opting to reset network settings, users are recommended to save Wi-Fi and Bluetooth credentials as all the saved data will be effectively whipped clean. Follow these measures to reset network settings on Android and iPhone:

  • Reset Network Settings on Android: Navigate to the primary Settings menu > Click on System > and then click on Reset to update network settings.
  • Reset Network Settings on iOS: Navigate to the primary Settings menu > Tap on General > Click on Reset iPhone > Select the Reset Network Setting to activate.

F. Try Inserting the SIM in Another Phone

Users may also try connecting the SIM card to an alternate device. If a similar issue is experienced then the SIM card may be damaged. Seek assistance from your carrier network to verify if there are any internal connectivity issues to identify relevant solutions. People should also toggle the Airplane mode on and off to gain a better perspective.

G. Turn on Safe Mode

Activate the Safe Mode such that all applications functioning in the Background are restricted. Turning the Safe Mode on will help users verify if the issue is rooted in third-party applications or phone software. Activate the Safe Mode by following these steps:

  • Press and hold the Power button until the power-off animation appears.
  • Now press and hold the volume down button until the Safe Mode Prompt flashes on the screen.
  • Select the Safe Mode option to activate. Your mobile phone should reboot with the power mode activated.

H. Contact Service Provider

If all else fails, ensure to seek direct assistance from your carrier network. Talk Home Mobile customers can dial 579 on their Talk Home SIM card or simply use the universal customer support helpline at +44(0)330 993 7339. Users may also send emails regarding their queries and concerns at


These were some of the primary aspects related to the “No SIM Card Installed” error. Be sure to implement the above-mentioned troubleshooting solution to get immediate results. Also, ensure to work with your carrier so that complete technical assistance to this error can be availed.


What can damage a SIM card?

SIM cards are primarily scarred due to corrosion and water damage. Ensure to frequently clean your SIM card to mitigate such issues.

Can a SIM slot be damaged?

Yes! SIM card slots are as susceptible to damage as every other mobile phone part.

How do I check if my SIM card is properly inserted?

Users will fail to get complete network connectivity if the SIM card is not properly inserted. However, if you can get a mobile network then it automatically indicates that your SIM card has been correctly inserted.

Can a software update fix the “No SIM Card Installed” issue?

Yes! The “No SIM Card Installed” error can be resolved with a software update, provided the issue originated due to the presence of software bugs.

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