Connect to a cellular network
Your Apple Watch with cellular will automatically switch to the most power-efficient wireless available: It can connect to your iPhone when itʼs nearby, a Wi-Fi network, or cellular. When your watch connects to cellular, it uses LTE networks. If LTE isn't available, your watch will try to connect to UMTS if your carrier supports it.
When your watch connects to a cellular network, you can check the signal strength from Control Center or the Explorer watch face. To open Control Center, touch and hold the bottom of the screen, then swipe up.

The Cellular button turns green when you have a connection. The green dots show the signal strength.

The Cellular button turns white when your cellular plan is active, but your watch is connected to your iPhone using Bluetooth or Wi-Fi.
