It’s no good to see the Last Line No Longer Available message flashing on your screen, especially when you are rushing to make an important call. It’s a bug that appears under your Recent List log, just beneath the Contact’s name you are trying to connect. So, if like others you’ve also been hit by this bug, try fixing it using the solutions listed below.
How do I fix Last Line No Longer Available bug on iPhone

The complete error message reads as the Last Line No Longer Available. Do you want to call using your remaining line? To fix last line no longer available iPhone error message, do the following.
- Clear Recent Calls list
- Turn Off Network Selection
- Disable WiFi Calling
- Reset Network Settings
- Disable AirPlane Mode
Fix Verizon Last Line No Longer available
The problem persists with iPhone models that support dual-SIM functionality. For instance, when you have both SIMs active i.e., a physical SIM and an e-SIM on iPhone, apps like FaceTime and iMessage will use the number you configured earlier as your default line.
Similarly, the same number (Default Line) will be used when you dial or message someone not saved in your contact list. So, when you are unable to reach a contact via the preferred number or SIM, you’ll be prompted to switch the line and thus, see this Last Line No Longer available iPhone message.
1] Clear Recent Calls list
You can try fixing this issue by deleting all your recent calls or just specific calls on your iPhone. For this,
Open the Phone app, then tap Recents to view a list of recent calls.

Tap the Edit button highlighted in Blue. The Delete button should become visible for all the entries.

Tap Clear, then tap Clear All Recents to remove your entire history or choose the Delete option to remove the history of a specific call. You can also delete specific calls by swiping left on the call and tapping Delete.
2] Turn Off Network Selection
If some unknown issues with the network service is causing this problem, you can fix it readily by turning off the Network Selection. To do so, navigate as follows.

Settings > Mobile Data > Network Selection > Automatic. Slide the toggle next to the Automatic option to the Off position.
3] Disable WiFi Calling
While Wi-Fi Calling makes the process of calling someone or receiving a phone call simple, especially in areas with little or no cellular coverage, it can create problems at times. As a basic troubleshooting step, you can try disabling the WiFi calling for a while and see if it helps to resolve the issue.

Go to Settings > Phone > Wi-Fi Calling and toggle the switch to the Off position.
4] Reset Network Settings
If all the above solutions fail to yield the desired results, reset the network setting.

For this, tap Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.
Note – This method also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you’ve used before. So, use it as your last resort!
5] Disable AirPlane Mode
Swipe down from the top of your Home Screen to go to Control Center. Check if the AirPlane mode is On. If yes, tap to disable it.
Hope that makes sense!
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