Try Basic Fixes

• Contact network carrier: Issues on your network carrier’s end can sometimes cause calls from your Apple Watch to fail. If you’re experiencing this problem, contacting your network carrier is advisable to resolve the issue. Several users managed to fix this issue by contacting their network carrier.
• Stay in the vicinity of your iPhone: The Apple Watch and iPhone connect via Bluetooth. For a harmonious connection between the two devices, they must be within each other’s Bluetooth range. Note that this is only applicable if you have a GPS-only Apple Watch. If you have a cellular variant, the Apple Watch does not need to be connected to your iPhone via Bluetooth.

Fix 1: Restart Your Watch

If your Apple Watch is flagging the call failed error due to a temporary glitch, a simple restart should do the trick. In fact, this fix has helped many users recover from this problem.

To restart your Apple Watch, press and hold the side button for a few seconds. Then, swipe the Power Off slider to the right to turn off the watch. Then, wait for a few seconds and turn your watch back on.

Fix 2: Enable Cellular Network

If restarting hasn’t done the deal, ensure that you have enabled a cellular network on your Apple Watch. For that, open the Watch app on your iPhone and head to Mobile Service. Here, you can check whether your network provider’s name reflects under the Cellular Plan tab.

If your Apple Watch is not using any cellular plan, follow the on-screen instructions to set up a cellular network on your Apple Watch.

Fix 3: Unpair and Pair the Watch

Many times, if the watch is not properly paired with the iPhone, users can face issues with syncing. So, first unpair your Apple Watch and then pair it back to your iPhone. Follow the steps below:

Step 1: Open the Watch app on your iPhone. Then, tap on All Watches in the top-left corner.

Step 2: Tap the i icon next to your watch’s details.

Step 3: Select Unpair Apple Watch. You can then choose the Unpair X’s Apple Watch option to complete the unpairing process.

Now, follow the on-screen instructions, and your Apple Watch will be unpaired and reset. Once your Apple Watch restarts, get your iPhone close to it to set it up.

Fix 4: Reset Network Settings

It’s possible that the network error you’re facing on your Apple Watch could be due to an issue on your iPhone. Hence, resetting the network settings on your iPhone is a good idea to rule out such issues. Here’s how.

Step 1: Open Settings on your iPhone and head to General > Transfer or Reset iPhone.

Step 2: Now, select Reset. In the pop-up, choose the Reset Network Settings option.

Fix 5: Update watchOS

Be it a phone or wearable, updates aid in removing bugs. So, if you have been experiencing an issue with calls on your Apple Watch, check whether you’re updated to the latest software version using these steps:

Step 1: Open the Watch app on your iPhone. Then, head to General > Software Update to check for new updates.

Step 2: Under this section, check for any new software updates. If there is one, download the update.