[Updated] 9 Fixes to “Last Line No Longer Available” on iPhone

iPhone says “Last Line No Longer Available”? What does the message mean? And how can you fix it? In this guide, you will be given effective solutions to the issue - “Last Line No Longer Available” on iPhone.

Demi by Demi Updated October 23, 2023
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The iPhone has undoubtedly become an integral part of our lives, serving as a versatile tool for communication, work, and entertainment. However, like any technological device, iPhones are not immune to occasional glitches and errors. One such error that has puzzled many iPhone users is the "Last Line No Longer Available." This cryptic message can disrupt your device's functionality, leaving you wondering what it means and how to resolve it.

last line no longer available

In this article, we will delve into the intricacies of the "Last Line No Longer Available" error on iPhones, explaining its possible causes and providing updated fixes to help you get your device back to its optimal performance.

What does “Last Line No Longer Available” mean?

When using an iPhone with a Dual SIM setup, you may encounter an error message that says "Last Line No Longer Available." This error typically occurs when the iPhone faces difficulty in detecting the default or preferred line while trying to make a phone call. While it is more commonly reported on iPhone 13 models, it can also affect other iPhone models that support Dual SIM functionality, such as the newer iPhone 14/15.

The "Last Line No Longer Available" error can occur due to various reasons, such as random bugs or glitches with the cellular radio, a corrupted call log, or incorrectly configured network settings. While this error may not completely prevent you from using your other number, it can be impractical and disrupt your calling experience.

9 fixes to “last Line No Longer Available” on iPhone

Let's go through each possible way to fix the "Last Line No Longer Available" iPhone error. Try them one after another until your issue gets fixed.

Switch phone lines manually

When you encounter the "Last Line No Longer Available" error on your iPhone, tapping the "Call" option on the pop-up will usually automatically route the call through the other available line on your device. If this doesn't work, you can try switching between the available phone numbers manually to make the call using the desired line.

• While dialing a new number, tap the current line at the top of the screen and pick the other line.

• While placing a call from the "Favorites" and "Recents" lists, tap the Info button and choose the number you want.

switch phone line manually

Turn on/off Airplane mode

Turning on and then off the airplane mode on your iPhone can serve as a quick trigger to reset the network connection. It's a simple and effective method to address network-related issues. It's worth trying if you encounter any network problems, including the "Last Line No Longer Available" error.

On your iPhone, you need to swipe down from the upper-right corner to launch the control center. After that, switch on the Airplane mode. Wait for seconds, and turn it off.

airplane mode

Force restart your iPhone

Force restart iPhone is also a common way to fix any tiny problem or bug when using iPhone. This process helps Clear the cache and temporary files on your iPhone can help fix various iOS issues by eliminating unnecessary data. While it might not guarantee a 100% success rate in addressing the "Last Line No Longer Available" error specifically, it can still be a useful step in troubleshooting the problem.

iPhone 8 and later with Face ID: Press and quickly release the Volume button > Perform the same operation on the Volume - button > Press the Side button and release when you see the Apple logo.
iPhone 7/7 Plus: Press and hold both the Volume - button and the Power button > Release both buttons when the Apple logo appears.
iPhone 6s or earlier: Press both the Power button and the Home button for seconds > Release both buttons when the Apple logo appears.

hard reset iPhone

Reinsert SIM card

Cleaning the SIM card and SIM tray, then reinserting the SIM card can indeed help resolve issues related to the detection of the SIM card. It's a good step to take when encountering problems like the "Last Line No Longer Available" error, as ensuring a proper connection between the SIM card and the iPhone is essential for smooth network operations. After cleaning and reinserting the SIM card, restarting the iPhone is a recommended step to check if the issue is resolved.

Clear call logs/history

Clearing the call history might help resolve the error, especially if the issue is related to a corrupt call log. Deleting the call history can remove any problematic or corrupt entries that may be causing the error. This is a simple and harmless step to try when facing this problem. After clearing the call history, it's a good idea to test the phone call functionality to see if the issue has been resolved.

Go to Phone app on iPhone > Find Recents > Tap Edit and choose the specific call logs or click All to select all call history > Click Clear to remove the call logs of your iPhone.

delete all call history

Turn off Find Contacts option

Apple users in some forums reported that turning off Find Contacts option on iPhone can solve the problem. You can go to Settings > Contacts > Siri and Search and turn off the Find Contacts in Other Apps option.

turn off find contacts

Update Carrier settings and iOS

Your carrier settings and operating system might need an update. An up-to-date carrier boosts the performance of their cellular network and solve bugs. And the latest version of iOS offers new features and has solved problems that the old ones create.

To update Carrier settings: Navigate to Settings > General > About > If an alert prompts out, your carrier needs to update. Hit Update to proceed.

update carrier settings

To update iOS: Go to Settings on your iPhone > Tap General > Software Update > If any update is available, download and install it.

iOS software update

Reset network settings

If still having network problems, it is suggested to reset the network settings to turn your network condition back to the factory default.

To reset network settings, go to iPhone Settings app > General > Transfer or Reset iPhone > Reset > Choose Reset Network Settings and confirm your operation from the prompt window.

reset network settings

Contact Apple support

If you've tried all the above methods and the "Last Line No Longer Available" error still persists, it may be time to reach out to Apple's support team. They can provide personalized assistance and guidance, and if necessary, arrange for a service appointment at an Apple Store or authorized service provider.


In conclusion, the "Last Line No Longer Available" error on your iPhone's Messages app can be frustrating, but it's not insurmountable. By understanding what causes the error and employing these updated fixes, you can troubleshoot and resolve the issue, ensuring that your iPhone continues to serve as a reliable communication tool. Remember to keep your iPhone's software up to date and maintain sufficient storage space to prevent such errors in the future.

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