Top 7 Ways to Fix Last Line No Longer Available on iPhone

Imagine this: you are in a hurry to make a phone call. You pull out your iPhone, dial the number and boom! Out of nowhere, an error pops up saying “The last line is no longer available”. If you are bothered by a similar error message, this guide is for you.

This error basically forces you to use the default line you choose (primary number) for voice calls or FaceTime calls on your iPhone. This means that the default number or line is used to call or message someone, whether or not the person is in your iPhone contacts. But if your iPhone can’t detect this last line (primary number), it will throw you this error – The last line is no longer available. This will mostly happen when you use iPhone in dual SIM mode – standard SIM and eSIM.

We’ve listed some troubleshooting tips that should help you fix the “Last Line No Longer Available” error message on your iPhone in no time. So let’s go.

1. Restart your iPhone

First, you can start by restarting your iPhone. This should close any background processes or services that might be responsible for the error and fix any minor incompatibilities.

If you have an iPhone X or later, press and hold the Sleep/Wake button and either volume button for the shutdown prompt to appear. On older iPhones, press and hold the Sleep/Wake button until the iPhone prompts you to slide to turn off the device.

Wait for your device to turn off completely, then press and hold the Sleep/Wake button again to turn it on.

2. Clear call log

Then try clearing the call log on your iPhone to see if that helps. Surprisingly, several users reported that they managed to fix the last line error by clearing call history on iPhone. You can also try.

Step 1: Launch the Phone app on your iPhone.

2nd step: Go to the Recents tab and tap Edit at the top.

Step 3: Tap Clear in the upper left corner and select Clear all recent items when prompted.

Restart your iPhone and try making a call to see if the error is resolved now.

3. Switch to airplane mode

If the error occurs due to a network-related issue, you can toggle Airplane mode on your iPhone to fix this issue. This will force your iPhone to reconnect to the network and might end up fixing the problem.

Swipe down from the top right corner to reveal the Control Center. Tap the Airplane icon to activate it. Wait a minute or two, then turn it off.

4. Remove and reinsert the SIM card

If the problem persists, you can try removing the physical SIM card from your iPhone and inserting it again. Power off your iPhone first, then use the SIM eject tool to remove the SIM card tray. Once removed, clean your SIM card with a microfiber cloth and insert it.

Turn on your iPhone and try making a call again.

5. Update carrier settings

Network operators also update their settings from time to time. Ideally, these updates are automatically installed in the background. But if for some reason the update was not successful, you can manually install those pending updates by following the steps below.

Step 1: Launch the Settings app on your iPhone. Go to General, then tap About.

2nd step: If there are any pending updates, a pop-up window will appear. Tap Update to continue.

Once updated, see if the error is resolved now.

6. Reset Network Settings

If updating carrier settings doesn’t help, you can try resetting network settings on your iPhone. This will restore all network settings to their defaults and resolve all network-related issues. Here’s how.

Step 1: Open Settings on your iPhone and go to General. Scroll down to tap Transfer or Reset iPhone.

2nd step: Tap on the Reset option at the bottom and choose Reset Network Settings from the resulting menu.

Enter the lock screen password to verify your identity. Once done, tap on the Reset Network Settings confirmation box to begin the restore process.

7. Update your iPhone

Finally, you can check for pending software updates on your iPhone. If a bug is causing the Last Line error in iOS, updating your iPhone to the latest version should help. Read on to find out how.

Step 1: Open the Settings app on your iPhone and go to General.

2nd step: Next, tap Software Update and check for the latest updates.

Download and install any pending updates on your iPhone.

This is most likely a temporary issue where your iPhone cannot identify your SIM card. So you can remove it and clean it properly using ISO propyl alcohol and a microfiber cloth. Make sure there is no dirt or residue on the SIM card.

Conclusion

Although such errors may prevent you from using your favorite SIM card and force you to use other methods, there is nothing that cannot be fixed with the solutions above. Let us know which one did the trick for you in the comments below.