Last Line No Longer Available Error in iPhone [Fix]

Nowadays, every mobile phone has dual sim functionality which allows users to make calls using any of the sim cards. But recently, it has been brought to our notice that many iPhone users are facing an issue whenever they tried calling someone on their iPhones, it threw an error that says “Last Line No Longer Available” and it gives two options whether to call or cancel.

This error means that the primary sim network signal is unavailable to make a call and if the user still wants to call then he can simply tap on the call option under the error message which calls using the other sim network.

This may not seem like a huge problem but it needs to be rectified because many users find it annoying. This could be either because of some network settings issue or outdated iPhone OS.

Although this error occurs on most iPhones primarily, the majority of the iPhone 13 users have been reporting this issue. Don’t worry! If you are also finding a way to resolve this issue, this article guides you on how to fix it using the methods given below.

Fix 1 – Clear the Recent Call History

When the call history data on your iPhone gets corrupted due to some obvious reasons, it might create a problem while trying to make a call as discussed in this article above. So clearing the recent call history might resolve this issue.

Step 1: After unlocking your iPhone, tap on the Dialer icon as shown in the below screenshot.


Dialer Icon 11zon


Step 2: Then tap on the Recents tab at the bottom of your iPhone’s screen.


Recents Tab 11zon


Step 3: Once you see the recent call history page, tap on the Edit button at the top right corner of the screen.


Edit Call History 11zon


Step 4: Then tap on the Clear option in the top left corner as shown in the below screenshot.


Clear History 11zon


Step 5: Now this will pop up a confirmation box at the bottom.

Step 6: Tap the Clear All Recents option once.


Clear All Recents 11zon


Step 7: This will clear all your call history from your iPhone.


Fix 2 – Enable and Disable the Airplane Mode option

Sometimes, enabling the Airplane mode and then after some time disabling it could possibly fix any issues which may have occurred due to connectivity issues in the cellular network. So we recommend trying to enable and disable the Airplane Mode on your iPhone using the steps given below.

Step 1: Unlock your iPhone first.

Step 2: After that, open the Control Centre by swiping the screen from the top right side to down.

Step 3: Now once the Control Centre screen appears, tap on the Airplane Mode icon in the top left corner once to enable it.

Step 4: After enabling it, wait for some time and then tap on it again to disable it.


Airplane Mode Off 11zon


Step 5: Once it gets disabled, the network connectivity gets restored on your iPhone and you will not get such errors again.

Fix 3 – Update the Carrier Settings on iPhone

Not updating the carrier settings on your iPhone might create such errors so we advise our users to check whether there is any update available by the carrier for your iPhone.

Step 1: Open the Settings page on your iPhone.

Step 2: Then tap on the General option as shown in the below screenshot.


General Settings 11zon


Step 3: Next, tap on the About option at the top of the General page.


About General 11zon


Step 4: Now scroll down to the Physical Sim section at the bottom which displays the carrier details and its settings.


Physical Sim 11zon


Step 5: If any update is available, then you will find a quick prompt on the screen to update the carrier settings.

Step 6: If you get such a prompt, tap on Update and follow the onscreen instructions.

After updating, check if the problem still persists.

Fix 4 – Turn Off Automatic Network Selection

Many iPhone users have claimed that they have been able to resolve this issue by simply turning off the Automatic Network Selection option on their iPhones. So let us also try doing the same and see if this works for us.

Step 1: Go to the Settings page on your iPhone.

Step 2: Next, tap on the Mobile Data option as shown in the below screenshot.


Open Mobile Data 11zon


Step 3: Then you will find an option called Network Selection. Just tap on it.



Network Selection 11zon


Step 4: Now just turn off the Automatic setting’s toggle button by tapping on it once.


Network Selection Automatic Off 11zon


Step 5: This will not check for the network signal automatically henceforth and the issue should get resolved.

Fix 5 – Turn Off the Wi-Fi Calling Feature

The Wi-Fi Calling feature allows users to use a good wifi network available instead of weak cellular weak signals. But this can create such errors if it is enabled. So try turning off the Wi-Fi calling feature on your iPhone.

Step 1: Go to the Settings page and tap on the Mobile Data option as shown below.


Open Mobile Data 11zon


Step 2: Now find the Wi-Fi Calling option and tap on it.


Wifi Calling 11zon


Step 3: Tap on the Wi-Fi Calling on This iPhone option‘s toggle button to turn it off as shown below.


Wifi Calling On This Phone 11zon


Fix 6 – Reset Network Settings

If none of the things work out, you can try resetting the network settings on your iPhone which might have been changed unknowingly by you. Follow the steps below to reset the network settings on your iPhone.

Step 1: Open the Settings page on your iPhone.

Step 2: Then tap on the General option once.


General Settings 11zon


Step 3: Tap on the Reset option as shown below.


Reset Iphone 11zon


Step 4: Now Select Reset Network Settings option from the list by tapping on it once as shown.


Reset Network Settings 11zon


Step 5: To proceed further, please enter your passcode when prompted on the screen.


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Step 6: Please tap on Reset Network Settings on the pop-up window to continue.


Reset Network Settings Confirm 11zon


Step 7: This will start to reset all your iPhone settings without losing any personal data.

Additional Fixes

  1. Many iPhone users have been able to resolve this issue by simply restarting their iPhones. This can be done by first shutting down your iPhone by navigating through Settings > General > Shut Down option. Then pressing the volume up button and power button at once until you see the Apple logo on the screen.
  2. If restarting your iPhone did not resolve the issue for you, then we recommend our users try checking if there are any updates available for your iPhone’s operating system and installing them in order to update your iPhone. You can update your iPhone by going to Settings > General > Software Update.