Final answer:
A cell phone call begins with a radio transmission to the nearest cell tower, which then connects the call across the network to the recipient's phone.
Step-by-step explanation:
When a person enters a phone number and initiates a call on a cell phone, the device utilizes a radio transmitter to send the dialing signal to the nearest cell tower. This signal is encoded to avoid interference and ensure it reaches the intended recipient. The tower then connects the call through the network to the cell tower nearest to the recipient's phone, which sends a signal to the recipient's device, prompting it to ring.
Upon answering, both phones establish a two-way communication link. This process seamlessly maintains the connection even as either party moves, by transitioning the signal between towers or cells, which is why you can keep talking even when you are on the move. The call is maintained seamlessly between towers, enabling continuous communication even when users are moving.