how to use my bluetooth headset with my apple watch 8 (cellular) ? Cellular service doesn't work if i turn on bluetooth in my apple watch 8

Hi najibm,

Turning on Bluetooth shouldn't disable cellular service on your Apple Watch, so make sure you're using these steps to connect your headset: Connect Apple Watch to Bluetooth headphones or speakers

If the issue persists, restart your Apple Watch and paired iPhone. Although simple, this step can help correct some unexpected behavior. It's also a good idea to make sure your iPhone and Apple Watch are running the latest OS versions since this can help with overall performance: Apple security updates.

Best regards.