[Fixed] iPhone WIFI Calling Not Working After Upgrading

Affiliate Disclaimer: If you purchase through links on our site, we may earn an affiliate commission at no additional cost to you!
Photo of author

Update on

Some say that their iPhone WIFI calling is not working after upgrading their device to the latest iOS version. It is needless to mention how troublesome it could be for any iOS user. Let’s learn about this error and its most practical solutions.

Many individuals are waiting to embrace iOS upgrades for a better user experience. However, iOS upgrades can come with some bugs once in a while and disturb regular usage.

One of the common issues after upgrades is the “iPhone WIFI calling not working” issue. According to statistics, this issue is pretty common among Spring users. But even some of the AT&T and O2 users say that they experience the same issue.

An Introduction to Wi-Fi Calling

For those who don’t know, Wi-Fi calling is a special feature introduced since iOS 8, which lets you make phone calls over Wi-Fi without using the mobile network. This feature becomes incredibly helpful for users who don’t have enough mobile carrier signal strength.

One of the best things about Wi-Fi calling is that it allows you to receive phone calls anywhere. The only requirement is to have a Wi-Fi connection. It is needless to say that Wi-Fi calling is a convenient feature to make your life easier.

PS: Let’s figure out how to fix the iPhone stuck on verifying update issues.

How to Easily Use the Wi-Fi Calling Feature on iOS 12?

Regarding iOS 12, Apple has changed the location of the Wi-Fi Calling feature. In earlier versions, the Wi-Fi Calling feature was available under the cellular tab on the iPhone. However, since the iOS 12 upgrade, it has been moved to the Phone app.

So, to locate it, you should go to Settings and choose Phone. Then, you will see the Wi-Fi Calling feature under that category. Based on the type of carrier used, you may find it under the carrier options. Please note that carrier options are available in the cellular settings.

Besides, are you seeing the error “last line no longer available” when making a call? If yes, read this article to know how to get rid of this error pop-up.

What If Your iPhone WIFI Calling Not Working?

Although the Wi-Fi Calling feature is supposed to work all the time solidly, it may experience some issues occasionally. As a result, iOS users will find that their iPhone WIFI Calling is Not Working.

Well, there are several different methods for you to try and get it working once again. We will help you to overcome this issue without leaving you in the dark. So, follow the methods below and get your iPhone Wi-Fi Calling feature up and running again.

Quick fix for iOS 12 users: Here’s a quick method for those who want to fix it quickly. Reboot the device and turn off its cellular data(Could not activate the cellular data network). You should turn off Wi-Fi Calling as well.

After that, you should turn on cellular data and Wi-Fi Calling after a couple of seconds. Just check if it works. For an AT&T connection, you should check if the latest updates for the iOS version are applied.

Method 01: Check for Potential Updates to Fix ‘iPhone WIFI Calling Not Working ‘

The most convenient method to fix the “iPhone WIFI calling not working” issue is to check for updates.

If a carried update has already been released, you should install it. These updates are generally offered whenever the carrier has upgraded its network. So,

The first and easiest method to see if something is awry is to see if a carrier update has been released. These updates are usually released when the carrier has upgraded the network.

If your device is not updated to the latest settings, there can be confusion. So, follow the steps below and get it fixed.

  • Launch the Settings app and go to General.
  • Then, tap on About.
  • You will see a prompt saying whether you need to install the new carrier settings. Just confirm it.
  • Once the downloaded is completed, you should get the device restarted. That will ensure that all the settings are appropriately installed.

Method 02: Update Your Subscriber Settings

Here’s another way to fix the “iPhone WIFI calling not working” issue. In this solution, you are required to update the “Subscriber Settings” on the device.

However, you should note that this method is not performed through the device’s Settings app. So, this method can be tried if you are a Sprint subscriber. So, instead of Settings, you should use the “Phone” feature.

Update your subscriber settings to fix iPhone WIFI calling not working
  • Launch the “Phone” app on the device.
  • Now, dial ##25327# on the keyboard.
  • Wait for some seconds; you will see that the process starts automatically.
  • If you notice that Sprint service loses its signals, don’t worry. The signals will return.
  • Once the update is done, you will see the Spring Wi-Fi logo on the status bar.

Also, do you want to know in detail about what does outgoing call mean? If yes, you are at the right place to learn everything about the outgoing call.

Method 03: Toggle on and off Airplane Mode

This super-easy method can get the device back in normal mode. This could be one of the easiest ways to fix the “iPhone WIFI calling not working” issue. All you should do is turn on Airplane mode on your device and turn it off once again.

With this trick, all the wireless connections on the device will be turned off and refreshed. For instance, its Wi-Fi, Bluetooth, and Cellular Data will be turned off. Once you disable the Airplane mode, the connections will restart.

Putting your device on Airplane mode is super easy. However, we have listed the steps for your convenience. There are two options to get it done.

Option 01:

  • Launch Control Center.
  • Tap on the button that looks like an Airplane to activate Airplane Mode.
  • Wait for about 30 seconds.
  • Tap on the same button once again to deactivate it.
Toggle on and off Airplane Mode to resolve iPhone WIFI calling not working issue

Option 02:

  • Launch the “Settings” option.
  • Then, tap on “Airplane Mode” to turn it on.
  • Wait at least for about 30 seconds.
  • Toggle off the “Airplane Mode.”
Toggle on Airplane Mode

Once the Airplane Mode is turned off, the device’s wireless connections will be restarted. That will fix minor connection issues associated with the respective device. So, after togging the Airplane Mode, you should check if the issue is fixed.

Method 04: Disable Mobile Data to Fix ‘iPhone WIFI Calling Not Working ‘

Airplane Mode indeed helps you get rid of wireless connections. However, in addition to that, you can try disabling the mobile data only to fix the issue.

Once you turn off the mobile data will force the device to utilize the Wi-Fi network only.

Just like with the previous method, you can turn off mobile data using two methods.

Method 01:

  • First, open your Control Center.
  • Tap on the icon that represents the network.
  • Wait at least about one minute.
  • Activate the network once again by tapping on the Network icon.
Disable Mobile Data to repair iPhone WIFI calling not working error

Method 02:

  • Launch the Settings.
  • Go to the “Cellular” option.
  • Toggle off the option “Cellular Data.”
  • Wait at least one minute.
  • Toggle on “Cellular Data” once again.
Disable Mobile Data

Also, some individuals say that Wi-Fi calling functionality works after choosing Wi-Fi as the primary network connection.

Method 05: Reset Your Device’s Network Settings

You already know that the Wi-Fi Calling feature works on both mobile and Wi-Fi networks. So, it is a smart move to reset the Network Settings on the device.

With that said, the process of resetting Network Settings is straightforward.

  • Go to Settings and choose “General.”
  • Scroll down to locate “Reset” and tap on it.
  • Select the option called “Reset Network Settings.”
  • Provide the passcode.
  • Confirm your action.
Reset your device's Network Settings

After resetting the Network Settings, all the Wi-Fi passwords will be lost. So, you will have to enter the passwords once again.

Method 06: Reset Your Device to Factory Settings

This can be considered a pretty intense method that fixes the “iPhone WIFI calling not working” issue.

We list this method as the last fix because it wipes out all the data in your device. So, you shouldn’t try it unless all the other methods have failed.

Also, before proceeding with this method, you should create a backup of the data available on the device.

● Create a backup

First of all, create a backup of the data available on your device. This step is compulsory for those who don’t want to lose their data during the process.

  • Go to Settings and tap on the Apple ID.
  • After that, select the iPhone from the available list of devices.
  • Now, tap on the option called “iCloud Backup.”
  • Then, tap on the option called “Back Up Now.”
Create a backup

● Turn off your device’s “Find My iPhone” feature

Once the backup is created, you should ensure that the “Find My iPhone” feature is turned off. Below are simple steps to get it done.

  • First, you should launch “Settings.”
  • Then, tap on the option called Apple ID.
  • Now, select your device from the available list.
  • After that, tap on the option called “Find My iPhone.”
  • Toggle that option off.
  • Now, enter your Apple ID password.
Turn off your device's "Find My iPhone" feature

● Wipe the data off

This step will get rid of all the data available on your iOS device. Mentioned below is how to get it done.

  • Go to “Settings” & select the option called “General.”
  • Now, please scroll down & tap on the option “Reset.”
  • Tap on “Erase All Content and Settings.”
  • Confirm your action.
Wipe the data off

Please note that this process will take a couple of minutes. Once everything is deleted, you can start the device from scratch. If required, you can use the existing backup from an iCloud backup.

Once everything is configured, the device should work, and the iPhone WIFI calling not working issue should be gone.

Important: Are you an iPhone user who uses the iOS device for conference calls and the Merge Calls feature? And, if you find it difficult to use the Merge Calls feature, disable Wi-Fi calling feature. Otherwise, the quality of the calls may be very poor.

Frequently Asked Questions (FAQs)

1. Why is WiFi Calling not working on my iPhone after upgrading?

WiFi Calling issues can occur due to various reasons, including incompatible carrier settings, software glitches, or network connectivity problems. Following the troubleshooting steps mentioned in this article can help diagnose and resolve the issue.

2. How can I check if WiFi Calling is enabled on my iPhone?

To check if WiFi Calling is enabled on your iPhone, go to “Settings” > “Phone” > “WiFi Calling” and toggle the switch to enable it. If the option is not available, contact your carrier to ensure it’s supported on your plan.

3. Will resetting network settings erase other data on my iPhone?

Resetting network settings will remove saved Wi-Fi networks and their passwords, but it won’t erase other data such as photos, messages, or apps.

4. Can a carrier restrict WiFi Calling on certain iPhone models?

Yes, carriers can restrict WiFi Calling on certain iPhone models or limit its availability based on network compatibility. It’s best to check with your carrier if you’re unsure about your device’s support for WiFi Calling.

5. What should I do if none of the troubleshooting steps work?

If none of the troubleshooting steps mentioned in this article resolve the WiFi Calling issue, it’s recommended to reach out to your carrier’s customer support for further assistance. They can provide more specific guidance and escalate the issue if necessary.


WiFi Calling is a convenient feature that enhances call quality and expands coverage using Wi-Fi networks. If you’re facing issues with WiFi Calling on your iPhone after upgrading, follow the troubleshooting steps mentioned in this article.

By checking the settings, updating carrier settings, resetting network settings, and contacting your carrier if needed, you can increase the chances of resolving the issue and enjoying uninterrupted WiFi Calling.


Ten years of experience in information and computer technology. Passionate about electronic devices, smartphones, computers, and modern technology.

More Articles

Samsung keyboard has stopped
Repair, Samsung

Best Way to Fix ‘Samsung Keyboard Has Stopped’ Issue

The Samsung keyboard is the default input method on Galaxy phones. It offers useful features like glide typing, ...
Server IP Address Could Not Be Found

5 Ways to Fix Google Server IP Address Could Not Be Found Error

Tired of facing the ‘Server IP address could not be found’ error on Google Chrome? You no longer need ...
Windows 10 Taskbar Not Hiding
Repair, Windows

Windows 10 Taskbar Not Hiding in Fullscreen? Fix It Now!

Is your Windows 10 taskbar not hiding? Learn how to make your desktop more neat, clean, and spacious by hiding the taskbar. Follow these steps to customize your settings and enjoy the benefits of a hidden taskbar.