Fix: “Last line no longer available” error on iPhone

Users of XS max and XR mostly encounter the error ” Last line no longer available, do you want to call using your remaining line?” This can be really annoying as it occurs almost every time you are trying to make a call.

If you have encountered it and would like to know how to fix it, you are on the right place. Just try the fixes below, one by one until the problem is solved.

1. Reset network settings

The wrong network settings may give the error. You should therefore reset your network settings to fix the error.

To do that:

  • Open the Settings menu
  • Go to General
  • Tap on Reset
  • Tap on Reset Network Settings
  • Input your device passcode if asked

Thereafter, try making a call to see if the issue is fixed.

2. Turn Airplane mode on then off

This trick has worked for many users and may work for you too. Turning the Airplane mode on disables all network functions on your device among other things. Restart your phone then turn the airplane mode off to re-enable the network functions.

Here is how to do it:

  • Open the Settings menu
  • Select Airplane Mode
  • Turn it On
  • Restart your device
  • Go back to settings
  • Select Airplane Mode again
  • Turn it Off

Read Also: Best free calling apps for iPhone and iPad

3. Update carrier settings

Updates of carrier settings comprise of small files meant to keep the phone network settings at optimum and fix some bugs. So, if you are most likely to encounter the error if you haven’t updated your carrier settings. To fix, you should update your carrier settings.

You don’t have to worry about the mandatory carrier settings as they update automatically. However, the optional settings are updated manually by following these steps:

  • Go to Settings
  • Tap on General
  • Go to the About section
  • Check any available updates of carrier settings. If there, install them by following the on-screen prompts.

4. Remove your SIM card then reinstall it

Sometimes, it could be a damaged or loose SIM card that is causing the error. To fix, you should check if your SIM card is in good condition then reinstall it. If it is loose, ensure you reinstall it well.

Unfortunately, if the SIM card is damaged, you only have the option of replacing it. After your SIM card is well installed, try making a call again to see if the problem is fixed.

Read Also: Change iPhone call ringing duration before voicemail

5. Update your iOS version

Running on outdated iOS version can lead to a number of errors including “Last line no longer available, do you want to call using the remaining line?” So, to fix the error, you should check for any update and install it. To do so:

Connect your phone to a stable internet connection

  • Go to Settings
  • Tap on General
  • Tap on Software update
  • Select Download and install
  • Tap on Install
  • Enter the passcode if asked.

If all the above fixes don’t work, you should contact your network service provider for further assistance.


That is all about fixing the error. Hopefully, one of them will help you fix the problem.