1. Open the Android phone and enter the application store, such as GooglePlay or Huawei application market.

2. Search for "GarminConnect" in the app store, find the GarminConnect app and download and install it.

3. In the GarminConnect application, select Add Device, and then select Observe.

4. Connect your Jiaming Watch 245 to your mobile phone according to the application prompts.

5. After the connection is successful, you can use the GarminConnect application to manage your watch, including downloading and installing applications, setting and adjusting watch settings, viewing health data and so on.