Can I switch between multiple calls on the Apple Watch 10

If you are on a call and wish to transfer it to your iPhone, you can do so by tapping the green bar at the top of your iPhone screen once it's unlocked[4][6]. However, while on a call using the Apple Watch, you cannot initiate or switch to another call directly from the watch[1][3].

The Apple Watch does allow for Group FaceTime audio calls, where you can add participants during an ongoing call, but this is specific to FaceTime and does not extend to standard phone calls[3].

Citations:
[1] https://discussions.apple.com/thread/251906421
[2] https://discussions.apple.com/thread/251996148
[3] https://support.apple.com/guide/watch/make-phone-calls-apdc38d7a95e/watchos
[4] https://discussions.apple.com/thread/8218008
[5] https://discussions.apple.com/thread/7783264
[6] https://support.apple.com/guide/watch/answer-phone-calls-apd32b6c5658/watchos
[7] https://discussions.apple.com/thread/255108259
[8] https://support.apple.com/guide/watch/use-dual-sim-apd641d0e7f1/watchos

Can I switch a call from my iPhone back to my Apple Watch

You can switch a call from your iPhone back to your Apple Watch seamlessly. Here’s how to do it:

1. Answer the Call on Your iPhone: When you receive an incoming call, answer it as you normally would on your iPhone.

2. Transfer to Apple Watch:
- Open the Phone app on your Apple Watch.
- Look for the green bar at the top that indicates an in-progress call.
- Tap on this green bar, which will allow you to transfer the call to your Apple Watch.

3. Confirmation: You may need to tap an option to confirm the transfer, depending on your settings.

This process allows you to take the ongoing call from your iPhone and continue it on your Apple Watch without any disconnection. Ensure that both devices are within Bluetooth range and have Handoff enabled for this feature to work effectively[1][2].