Why cant i hear anything on my watch when i answer a call on my watch?

Hi

The following steps may help, having resolved the same issue for other users:

Unpair your iPhone from a Bluetooth headset, if one is presently paired to it.

Restart both your iPhone and your Apple Watch (normally), turning both devices off together, then restarting your iPhone first:

• Restart your iPhone, iPad, or iPod touch - Apple Support
• Restart your Apple Watch - Apple Support

Hi,

"I can't hear the other person"

On your iPhone tap Settings > General > Reset > Reset Network Settings then restart your iPhone and Apple Watch.

This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you’ve used before so you will have to re enter your Wi-Fi password in Settings > Wi-Fi.

Then try a call on your Apple Watch.