Now that we’ve explored potential causes, let’s proceed to various methods for resolving the problem. Without further delay, let’s address the issue promptly.

Why is the iPhone Showing An Error Message “Last Line No Longer Available?”

Upon the initial activation of an iPhone 13, users are encountering the ‘Last Line No More Available’ error, a concern believed to be linked to the eSIM functionality of certain older iPhone models. The e-SIM, a digital SIM card, facilitates dual-SIM functionality on newer iPhone models, including the iPhone 13 series, iPhone 12 series, iPhone 11 series, and iPhone XR.

Users encountering the ‘Last Line No Longer Available’ error receive a prompt when attempting to call their default line, as indicated in the recent logs of the Phone app. The default line corresponds to the SIM used for calling or messaging individuals not saved as contacts.

This issue hinders users from dialing contacts using their preferred SIM card, necessitating the exploration of alternative communication methods. Importantly, the problem extends beyond the iPhone 13 model and affects older iPhones that have been updated to iOS.

Reports on Apple Communities and Reddit reveal similar challenges, with this error surfacing on older iPhones that support dual-SIM functionality.

How to Fix the “Last Line No Longer Available” Error on iPhone

If your iPhone keeps showing the “Last Line No Longer Available” error, you might want to consider the following solutions. You should verify that the problem persists after you have tried each of these solutions.

Fix : Clear Recent Phone Logs

When confronted with the issue, the initial step is to clear any recently created call logs on your device.

As previously mentioned, the problem may stem from call logs predating a system update, and there have been indications that the issue is specifically tied to the contact present in the call logs.

To address this, it is crucial to delete the call logs from your device. Several users have reported encountering the problem, and a solution has been proposed.

Follow the steps below to accomplish this:

1. Open the Phone App on your iPhone.
2. Once the Phone app is open, tap the “Recent” option at the bottom.
3. Next, tap the “Edit” option in the upper-right corner of the Recent screen.
4. Afterward, tap on the “Clear” option in the upper-left corner.
5. Tap the button in the dialog box that says “Clear all Recents.”
6. Now, you can place another phone call to check if the problem persists.

Fix 1: Enable/Disable Wi-Fi calling

Wi-Fi calling enables iPhones to utilize a Wi-Fi network for making phone calls, allowing calls to be made over a wireless network rather than relying on the cellular provider. However, users may encounter the “Last Line No Longer Available” error when connecting to Wi-Fi networks for calls.

To address this issue, you can disable Wi-Fi calling if it is currently enabled. Here’s how to resolve the problem:

1. Open the Settings App on your iPhone and select “Mobile Data.”
2. Tap on “Wi-Fi Calling” in the Mobile Data settings.
3. Disable the “Wi-Fi Calling on This iPhone” toggle.
4. If the feature was disabled and you still encounter the “Last Line No Longer Available” error, you can try turning it back on.
5. After turning it on, you will be prompted to confirm your decision to enable Wi-Fi calling. Tap “Enable” to proceed.
6. Check if the “Last Line No Longer Available” error is resolved.

It’s worth noting that the fix varies among users, as some have resolved the problem by disabling the feature, while others have found success by enabling Wi-Fi calling.

Fix 2: Enable/Disable the Network Selection

Modern smartphones, including iPhones, are designed to seamlessly connect to cellular networks in their vicinity. However, users may encounter difficulties connecting to a mobile network, resulting in the “Last Line No Longer Available” error on their iPhones.

To troubleshoot and determine if the error persists, consider disabling and re-enabling network selection. Follow these steps:

1. Open the Settings app on your iPhone and select “Mobile Data.”
2. Tap on “Network Selection” to view your network provider’s name.
3. Disable the “Auto” toggle to turn off automatic network selection.
4. Choose a network from the list provided that belongs to your service provider.
5. Check if the “Last Line No Longer Available” error still appears on your iPhone.

To ensure your iPhone automatically selects the cellular network, re-enable the “Automatic” toggle at the top. If the problem persists even after activating this feature, you can try the following:

1. Disable the “Automatic” switch again.
2. Manually select your network to avoid the “Last Line No Longer Available” error.

By following these steps, you can troubleshoot network connectivity issues on your iPhone and address the associated error.

Fix 3: Force Restart Your iPhone

To resolve the issue of “Last Line no Longer Available” on your iPhone, you can attempt a force restart, also known as a hard reset. This process helps clear the cache and eliminates temporary files, often proving effective in resolving various iOS problems. Follow these steps based on your iPhone model:

For iPhone 8 and later:

1. Press and release the volume up button.
2. Press and hold the volume down button.
3. Press and hold the side (power) button until the Apple logo appears on the screen.

For iPhone 7/7+:

1. Simultaneously press and hold the power button and the volume down button.
2. Continue holding both buttons until the Apple logo is displayed.

For iPhone 6s/6+ or older:

1. Press and hold both the power button and the home button simultaneously.
2. Keep holding them until the screen goes black, and the Apple logo appears.

Performing a force restart according to your iPhone model should help address the “Last Line no Longer Available” issue.

Fix 4.Switch Between SIMs

iOS allows you to switch between SIM cards for calls on your iPhone, offering flexibility even when the default phone number for messages and calls has been set. In case the “Last Line No Longer Available” issue hinders calling the default line, you can follow these steps:

1. Open the contact you want to call.
2. Tap the button next to the contact’s name.
3. Choose your default number.
4. Select the alternate number if needed.

If you prefer to manually dial a number and want to choose an alternative SIM, simply tap on the primary number and select the alternative SIM to proceed with the call. This way, you can manage your SIM preferences and make calls using the desired phone number on your iPhone.

Fix 5.Update Carrier Settings

You can also update your carrier settings to resolve the “Last Line No Longer Available” issue on your iOS device. You can fix the problem by updating your carrier settings on your iOS device.

It is a good thing that carriers often release updates to improve the performance of the cellular network and fix random problems.

• Navigate to General-> About in the Settings app. You may be prompted to update your carrier settings.
• Next, click ” update” at the prompt. You are now good to go!

Fix 6.Removing And Reinserting Your SIM

Is there a solution that works for you? You can remove the SIM card from your phone and re-insert it.

• This age-old trick can often be used to fix cellular problems.
• To remove the SIM tray from your iPhone, turn off the device.
• Wait for a while and then insert the physical SIM card.
• To turn your device on, hold down the power button.
• Try placing a call with the default line on your iPhone to see if the ‘Last Line No Longer Available’ error prompt still appears.