2019-4-17 · If your iPhone and Apple Watch Series 4 (GPS + Cellular) or Apple Watch Series 3 (GPS + Cellular) are both connected to a cellular network, your watch can do everything that it normally does, even if your iPhone isn't with you. 1 When your watch connects to a cellular network, appears in Control Center. If your watch is connected to a cellular network, but your iPhone isn't nearby, your watch ...