The Automation Systems Can Control The "Hand Off" Of A Customer Handset Moving Between One Cell And Another So That A Call In Progress Continues Without Interruption, Changing Channels If Required.
A battery, providing the power source for the phone functions. A modern handset typically uses a lithium-ion battery (LIB), whereas older handsets used nickel–metal hydride batteries.
A display which echoes the user's typing, and displays text messages, contacts, and more. The display is typically either a liquid-crystal display (LCD) or organic light-emitting diode (OLED) display.