How to set up a smart watch

So, you bought a smartwatch. A wrist smartwatch is a compact modern device that can both complement a smartphone and work independently, partly replacing it. Now there are many models from different manufacturers. How to choose a smartwatch is no longer a question.
How to set up a smart watch, connect the smartwatch to the phone correctly, instructions on how to set the date and time and what else you need to remember before using the gadget. Connecting a smartwatch to a smartphone is necessary for the full operation of the device and access to a number of functions. You only need to configure the connection once. In the future, the connection and synchronization are carried out automatically. Let's look at how to connect devices for iOS and Android.
1- Smartwatch functions;
2- How to connect a smart watch to Android;
3- How to connect Apple Watch to Android;
4- How to connect a children's smart watch;
5- What to do if the smartwatch does not connect;
6- How to set up the Internet on a smartwatch;
7- Setting up the Mi Band 3 smartwatch;
8- Setting up the Honor Band 3 Smartwatch;
9- Setting up a smartwatch;