What Does Last Line Unavailable Mean on iPhone? Here’s How to Fix it

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Smriti Razdan
Smriti Razdan
Smriti started her journey by attaining a degree in computer applications. She loves to indulge in reading undiscovered stories only to draw profound explanations about life and its existence. She welcomes you aboard on her expedition of finding herself. Smriti writes her content with a smile on her face hoping to transcend it to her readers.

Have you recently installed an e-Sim on your iPhone and used both physical Sim and e-Sim? If yes, then you might be wondering What does Last Line Unavailable Mean? The same issue is faced by a lot of iPhone users, and they are absolutely clueless about it.

In this article, I will solve the problem and guide you through each step. But before that, you should check this setting from your side to ensure that everything is in place. The first thing that you should check is that you have set a preferred SIM card for calling and iMessage in the settings.

Even after setting the preferred SIM card, if you’re trying to make a call and you’re getting the error, Last Line not Available. Then you should follow the article till the end because I have mentioned detailed steps through which you can solve this problem in just two minutes.

What Does Last Line Unavailable Mean

What Does Last Line Unavailable Mean on iPhone? Here's How to Fix it

Last Line Unavailable means you are using Dual-sim updated option on your iPhone and updated the software. After the update, the system may not be able to recognize which sim is your preferred sim for calling.

Alternatively, it may also mean that the sim you wish to use for making the call has weak or no network strength.

Also, read What Does Notifications Silenced Mean On iPhone in 2022

How to Solve Last Line Unavailable on iPhone

What Does Last Line Unavailable Mean on iPhone? Here's How to Fix it

Just like other Apple users, if you are also annoyed with the Last Line not Available error, then the following steps will remove your worry.

Through Airplane Mode

  1. Enable Airplane mode on your iPhone by swiping down from the top right corner of the screen and keeping it for a few seconds.
  2. Then disable it and check if the desired sim for the call has good network strength.
  3. Now you should be able to initiate the call using your preferred sim card.

Through Call Logs

In case the first method did not work, you should try this one. In this method, you must clear All recents from the Phone App. After opening the Phone App, go to edit in the top right corner and clear recents. The logic behind this method is to remove all the cache saved with the previously dialed number. 

After clearing recents, you must restart your iPhone and check if the problem is solved.

Also, read What Does Privacy Warning Mean on Wi-Fi | Read Why You Must Fix it Now

Disable Wi-Fi calling

What Does Last Line Unavailable Mean on iPhone? Here's How to Fix it

In case the first two methods did not work, you should try and disable Wi-Fi calling. Wi-Fi calling allows you to make or receive calls when the network strength is low, but sometimes, your calls may not connect, and an error Last Line Unavailable may occur. 

What Does Last Line Unavailable Mean on iPhone? Here's How to Fix it

Thus, disabling Wi-Fi calling will ensure that you are making calls via the cellular network itself.

Also, read What Does No Location Found Mean On iPhone | We Found the Fix and it’s Super Easy

Update Network Carrier Settings

What Does Last Line Unavailable Mean on iPhone? Here's How to Fix it

Sometimes random issues may occur with the cellular network itself. Therefore, in order to perform this step, go to Settings, then General, then open About and check if there is any update appearing from the network provider. If not, then you should reset the settings in the next step.

Reset Network Settings

If none of the above options work out, then, in the end, you should try to reset your network settings which will clear all the cache as well as the previously saved data, such as your preferred SIM. To perform this action, you should go to Settings, then go to General, then open Transfer or Reset iPhone.Then click on Reset Network Settings.

Also, read What Does Emergency Override Mean | Does Emergency Override Warning Void the Warranty? 

What Does Last Line Unavailable Mean on iPhone?

Wrapping Up

This completes my article on What Does Last Line Unavailable Mean? I hope that you were able to solve this problem using the steps mentioned above. If not, then drop a comment and specify if you faced any issues while performing the steps to solve this problem. 

For more information on such topics related to Apple devices, follow Path of EX. 

Frequently Asked Questions

Q. What does Last Line Unavailable Mean?

A. Last Line Unavailable means you are using Dual-sim updated option on your iPhone and updated the software. After the update, the system may not be able to recognize which sim is your preferred sim for calling.

Q. What does Red Dot mean on Apple Watch?

A. The red dot on the Apple Watch basically means that you have an unread notification. Although it is an innovative solution for checking notifications on your watch when you are away from your iPhone, especially when you own an LTE version of the Apple Watch, the same feature can become a reason for your distraction.

Q. What Does Privacy Warning Mean On Wi-Fi

A. On your iPhone, Privacy Warning on Wi-Fi means you are connected to a Wi-Fi network that can access your MAC address. You may ask what the MAC address is. MAC stands for Media Access Control. It is the code through which the Wi-Fi network recognizes the connected device.

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