Toggle Airplane Mode On and Off

One potential fix for the “Last Line No Longer Available” error is to toggle Airplane Mode on and off. This can sometimes reset the connection between the iPhone and the cellular network, which may fix the problem.

• To do this, swipe up from the bottom of your iPhone’s screen to open Control Center. Then, tap the Airplane Mode icon to turn it on.
• Please wait a few seconds, then tap the Airplane Mode icon again to turn it off. This will disable your iPhone’s wireless features, including cellular data, Wi-Fi, and Bluetooth.

Restart Your iPhone

Try restarting your iPhone if toggling Airplane Mode doesn’t fix the problem. This will give the device a chance to reconnect to the cellular network and may fix any software glitches that could be causing the error.

• To restart your iPhone, press and hold the Sleep/Wake button on the side of your device until the Slide to power off slider appears. Then, slide the slider to the right to turn off your iPhone.
• Once your iPhone is turned off, press and hold the Sleep/Wake button again until you see the Apple logo. This will turn on your iPhone and hopefully fix the “Last Line No Longer Available” error.

Clear Your Recent Call Log

If you still see the “Last Line No Longer Available” error, try clearing your recent call log. This can sometimes fix the problem by resetting the connection between the iPhone and the cellular network.

To clear your recent call log:

• Open the Phone app
• Tap on the Recents tab at the bottom of the screen. Then, tap on the Edit button in the top-right corner of the screen.
• Tap on Clear from the top-left corner.

This will remove all of your recent calls from your iPhone. If this fixes the problem, you can add them back by manually adding them to your Contacts app.

Switch to a Different SIM Card

If you still see the “Last Line No Longer Available” error, try using a different SIM card. This will help you determine if the problem is with your iPhone or your carrier.

To do this, remove the SIM card from your iPhone and insert it into another phone. Then, try making a phone call from that phone. If the call goes through without any problems, then the problem is likely with your iPhone and not your carrier.

Next, if possible, you can attempt to insert a different SIM card into your phone to test the issue further. Your original one may be at fault if the call goes through from a different SIM card. So, if you’re still having trouble, contact your carrier for further assistance.

Update Your Carrier Settings

If you still see the “Last Line No Longer Available” error, try updating your carrier settings. This can sometimes fix the problem by resetting the connection between the iPhone and the cellular network.

To update your carrier settings:

• Open the Settings app and tap on General.
• Then, tap on About. You should see a popup that says Carrier Settings Update if an update is available.
• Tap on Update to install the update.

After the update has been installed, restart your iPhone and try making a phone call again. Hopefully, this will fix the problem.

Disable Wi-Fi Calling

If you still see the “Last Line No Longer Available” error, try disabling Wi-Fi Calling. This can sometimes fix the problem by resetting the connection between the iPhone and the cellular network.

To disable Wi-Fi Calling:

1. Open the Settings app and tap on Phone.
2. Then, tap on Wi-Fi Calling and toggle the switch to the Off position.

After you have disabled Wi-Fi Calling, restart your iPhone and try making a phone call again. Hopefully, this will fix the problem.

Update Your iPhone to the Latest Version of iOS

If you’re still seeing the “Last Line No Longer Available” error, try updating your iPhone to the latest version of iOS. This can sometimes fix the problem by resetting the connection between the iPhone and the cellular network.

• To update your iPhone, open the Settings app and tap on General. Then, tap on Software Update.
• If an update is available, tap on Download and Install to install it. After the update has been installed, restart your iPhone and try making a phone call again. Hopefully, this will fix the problem.