The Apple Watch doesn't have to be paired with a phone.
1, Apple Watch iwatch can be used without the iPhone, but only a part of the function
2. Apple Watch iwatch can only be used for Apple mobile phone system, and non-Apple mobile phone system cannot match Apple Watch iwatch.
When the iPhone is not around, the iwatch can also use the following functions:
1. Use Siri to get directions, send iMessage messages, and more (requiring a connection to a wireless LAN or cellular network).
2, send and receive information (need to be connected to a wireless LAN or cellular network).
3, make and receive calls (need to be connected to a wireless LAN or cellular network).
4, check the weather (need to connect to a wireless LAN or cellular network).
5, set reminders (need to be connected to a wireless LAN or cellular network).
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6, listen to the radio (need to connect to a wireless LAN or cellular network).
yes
Apple Watch does have to have an Apple phone to use, if you just use the Apple Watch to see the time or test the heartbeat, it can be used, if you want to play the other functions of the Apple Watch, or you need to use the Apple phone.
Moreover, the Apple Watch must be paired with the Apple phone before you can enter the normal watch page of the Apple Watch, the real function of the Apple Watch will be opened, after pairing, the Apple Watch can be used without connecting to the phone, but it can only use its own functions.