Does the apple watch need a separate phone number

Hi

Apple Watch neither needs nor supports using a separate phone number for the watch.

The watch does not have cellular capabilities of its own, so cannot be used for cellular calls or text messages via cellular service unless it is connected to the paired iPhone (but Wi-Fi calling may be available - see below), which must be an iPhone 5 or later, running the latest version of iOS:

Set up your Apple Watch - Apple Support

The full range of features is available when Apple Watch and iPhone are connected. Whenever possible, the devices will connect via Bluetooth.

You don't necessarily need to have your iPhone on or immediately around you (within arm's reach, for example) for the devices to establish and maintain their Bluetooth connection. Normal Bluetooth range is around 33 feet / 10 meters (this will vary in practice due to wireless interference).

Whenever your watch can't connect to the iPhone, it will attempt, as a fallback, to connect to a known, compatible Wi-Fi network.

When instead connected to Wi-Fi, the watch also still offers a number of features, including receiving and sending messages via iMessage. If your carrier offers Wi-Fi Calling and it is supported on your plan and enabled on your iPhone, you can also use Apple Watch to make calls and (subject to carrier support) send and receive texts.

If your watch is unable to connect either via Bluetooth or Wi-Fi, it again still offers some - although fewer - features.

Features that remain available in each case are detailed here:

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

For the best performance from your iPhone and Apple Watch, including the most power-efficient communication between them, Apple recommends keeping both Bluetooth and Wi-Fi permanently enabled on your iPhone.

More information:

About Bluetooth and Wi-Fi on Apple Watch - Apple Support

The watch cannot be used without an iPhone 5C or later. It has to be synced with a phone at all times for use.

It can play iTunes music and track your workout without being in a Bluetooth range of the synced phone, but little else.

Hello, the apple watch does not need a seperate phone, you can use the iPhone that you use regularly to make calls and text but in order to do those things you must have a phone. The watch also does not connect to a wireless carrier since the watch is not equipped with the proper hardware to do that.