apple watch does not make calls without phone

Hi

The functions that are available on Apple Watch when it is away from the paired iPhone depend on various factors including:

• Your Apple Watch model):

  Apple Watch - Compare - Apple

• The features of your carrier service plan and your settings:
  • Apple Watch - Carriers - Apple
  • Make a call with Wi-Fi Calling - Apple Support
  • Make calls over Wi-Fi
• The type of connectivity that is available to your Apple Watch at the time:

  About Bluetooth, Wi-Fi, and cellular on your Apple Watch - Apple Support

Features and requirements that apply under various circumstances are detailed here, including within footnote #2 in respect of calls:

How to use your Apple Watch without your iPhone nearby - Apple Support

If you have an Apple Watch Series 3 (GPS + Cellular) model, then it may help to check that you have followed the instructions here for setting up and using the cellular feature on your Apple Watch:

• Set up and use cellular on Apple Watch Series 3 (GPS + Cellular) - Apple Support
• Use Apple Watch with a cellular network—Apple Watch Series 3 (GPS + Cellular) only

If you still need help, then I suggest that, in the first instance, you contact your carrier again for assistance with using the built-in cellular feature.

If the issue persists, then, depending on your carrier's advice, I suggest that you next contact Apple Support (remote diagnostics and/or mail-in service may be available, if required), make a Genius Bar reservation or visit an Apple Authorised Service Provider for assistance:

• US: Apple Watch Service Answer Center - Apple Support
• Elsewhere: Apple - Support