MOBILE HANDSETS

Contents

IntroductionHandset ArchitectureHandset Operating SystemsGenerations of mobile technologyMobile handsets according to technology

What Is A Mobile Handset?A mobile handset

(handset) is an electronic device that provides services to users, e.g.: Managing address book Scheduling calendar Cellular telephony Accessing Internet, email

Handsets include smartphones and PDAs

Example handsets:Apple iPhone, BlackBerry Storm, Palm TreoPro

What’s Inside a Mobile Handset?

Source: [3]

Handset Architecture (1)

Handsets use several hardware components: Microprocessor ROM RAM Digital signal processor Radio module Microphone and speaker Hardware interfaces LCD display

Handset Architecture (2)

Handsets store system data in electronically-erasable programmable read-only memory (EEPROM) Service providers can reprogram phones without

requiring physical access to memory chipsOS is stored in ROM (nonvolatile memory)Most handsets also include subscriber

identity module (SIM) cards

SIM Cards

They include their own microprocessor and 16 KB – 4 MB EEPROM

They come in two sizesTheir versatility arises from portability of

information SIM card identifies subscriber to network Stores personal information, address books,

messages, service-related information

Handset Operating Systems

Currently, handsets run several OSes: Symbian OS iPhone OS (an embedded version of OS X) Windows Mobile BlackBerry OS Google Android Platform (based on Linux)

With the exceptions of Symbian and Android, these OSes are proprietary [9–10]

Telecom carriers frequently “lock down” handset firmware, OSes to prevent user modifications

Advantages of mobile technologies

0G TELEPHONES

1G MOBILE HANDSETS

Ex for 2G MOBILE HANDSET

Ex for 3G mobile handset

Some examples for 4G mobile handsets

CONCLUSION

So by this presentation we can examine that as the technology is developing the compatibility and the features of the mobile handsets are increasing day by day.