Developing of telecommunications

1.

Developing of
Telecommunications

2.

3. The common components of phone

•A battery, providing the power source for the phone functions.
•An input mechanism to allow the user to interact with the phone. The
most common input mechanism is a keypad, but touch screens are also
found in most smartphones.
•Basic mobile phone services to allow users to make calls and send text
messages.
•All GSM phones use a SIM card to allow an account to be swapped among
devices.

4. Motorola DynaTAC 8000X

5. Motorola StarTAC

6. Nokia 5210

7. Ericsson T68

8. iPhone 3GS

9.

Thank you for attention.
What model of a cellphone do you
own?