Blocking a number on your Apple Watch prevents unwanted calls and messages from a specific phone number. This can be useful for a variety of reasons, such as blocking spam calls or unwanted solicitations, or for protecting your privacy.
There are a few different ways to block a number on your Apple Watch. One way is to do it directly from the Phone app. To do this, open the Phone app and tap on the Recents tab. Then, find the contact you want to block and tap on the info button (the circled “i”). Scroll down and tap on the Block this Caller option. You will be prompted to confirm your choice. Once you have confirmed, the contact will be blocked and you will no longer receive calls or messages from them.