How to Fix Last Line no Longer Available on iPhone?

Many iPhone users have reported encountering the ‘Last Line No Longer Available’ error, especially after certain updates. This error typically arises after a recent software update, causing the device to struggle in selecting a line for making phone calls. Often, the eSIM or Dual-SIM activation is the culprit.

When the eSIM or Dual-Sim is activated on your iPhone while having your main SIM inserted, the device may get confused about which line to choose when making a call, resulting in this error message.

iPhone Models Susceptible to the ‘Last Line No Longer Available’ Error:

• Phone XR
• iPhone XS and XS Max
• iPhone 11 series
• iPhone 12 series
• iPhone 13 series
• iPhone 14 series (including Pro and Max)
• iPhone 15 and 15 Plus
• iPhone SE (2022)
• iPhone SE (2020)

Basic Troubleshooting

Before diving into detailed solutions, let’s start with some basic troubleshooting:

• Turn on airplane mode for 30 seconds, then turn it off.
• Ensure the SIM you’re trying to call from has a high signal strength to prevent the iPhone from automatically selecting the network.

If these initial steps don’t resolve the issue, consider the following detailed fixes:

1. Manually Change to the Other Phone Line

When you encounter this error on your iPhone, you will be presented with two options: Call or Cancel. Before trying the fixes listed below, the first solution you should try is pressing the Call option to switch over to your other phone line.

This will likely fix the error and allow you to connect to the call, but in certain cases, even this method does not solve the issue.

If you continue to face this error even after pressing the Call option, you’ll need to change to the remaining line on your phone manually. There are two ways to do this.

When you dial a number on your iPhone, you’ll see an option at the top of your screen showing the current line selected. Tap on this option, select the other line, and dial the number to switch to this line manually. 

If you dial the number through the Contacts app, tap the option next to “Default” under their name. This is the Preferred Line option and it allows you to choose a specific line to call the person with. 

If you continue to face this error after trying this solution or do not want to use the other line on your phone, continue with the solutions we’ve listed below.

2. Clear Recent Call Logs

The main reason for this error message is your recent call logs. The issue has reportedly occurred with contacts in your recent call logs before the update. There also have been reports of the problem only occurring on the contacts in the recent call logs.

Therefore, you will have to clear out the call logs to resolve the issue. If you don’t want to clear the recent call logs for any reason, you can skip this method and move to the next one.

To do this, follow the instructions that are provided down below:

1. Open up the Phone app on your iPhone.
2. Tap the Recent option at the bottom.
   

   

3. Then, tap the Edit option on the Recent screen at the top-right corner.

   

4. Now, tap the Clear option at the top-left corner.

   

5.  Tap the Clear All Recents option.

   

6. Try making a phone call again to see if the problem still occurs. 

3. Turn off WIFI Calling

WIFI Calling is a feature in iPhone devices that allows you to call your contacts over a WiFi network instead of using your cellular data. However, when you make a call using this function, your phone thinks of it as another SIM, which causes a conflict and then shows your ‘Last line no longer available’ error message.

You will have to turn off Wi-Fi calling to resolve this issue.

1. Open up the Settings app on your iPhone.
2. Tap the Mobile Data option. Note: On older versions, this may be called Cellular.

   

3. In the Mobile Data settings, tap the Wi-Fi Calling option.

   

4. There, make sure it is turned off.

4. Disable Automatic Network Selection

The network selection setting on your phone can also cause this issue. Network selection allows you to choose a network manually or automatically. However, when this option is set to automatic, it tries to select the network with good signal strength.

Which is known to cause issues in iPhones that support eSIM or Dual-SIM functionality. Turning off the Automatic Network Selection option should resolve the ‘Last Line No Longer Available’ Error.

1. Open up the Settings app on your iPhone.
2. Head to the Mobile Data section, which can also be called Cellular on some versions of iOS.

   

3. Tap on the Network Selection option.

   

4. There, ensure automatic network selection is disabled by tapping on the slider provided next to Automatic.

   

5. With that done, try making a call again to see if the problem still occurs. 

5. Reset Network Settings

Incorrect network configurations can also cause this issue, to ensure that there isn’t any conflict in your network configurations. We will reset the Network Settings in our iPhone as it can fix this issue. Follow these steps:

1. Open up the Settings app on your device.
2. Navigate to General

   

3. Tap on the Reset option at the bottom.

   

4. Once you are on the Reset screen, tap on the Reset Network Settings option.

   

5. With that done, go ahead and try making a call. Check if the error message still comes up.

While technology can sometimes present challenges, solutions are often within reach. This guide aims to be a comprehensive resource for iPhone users facing the ‘Last Line No Longer Available’ error. With the steps outlined above, you should be able to address the issue effectively. For any further queries or feedback, please leave a comment below.