Gsm Phones

A.    INTRODUCTION TO MOBILE PHONES AND SERVICE PROVIDERS

1.      Mobile phones acronyms and terminologies

2.      Mobile phone bands and their uses

3.      Types of mobile phones

4.      Phone accessories and their functions

5.      Types of menus and sub-menus

6.      Service providers and their  codes

B.     BASIC COMPUTER AND INTERNET CONCEPTS.

1.      Introduction to computer

2.      Introduction to internet

3.      Browsing the web

C.    ESSENTIAL COMPONENTS OF MOBILE PHONES AND THEIR FUNCTIONS

1.      Structure of mobile phones

2.      Hardware components

3.      Software components

D.    MAINTENANCE AND REPAIR OF MOBILE PHONES

1    Electronic components in mobile       phones

2    Preventive maintenance

3    Corrective maintenance

4    Common tools and equipment for hardware and software repairs.

5     Safety in mobile phone workshop

6      Common hardware problems

7      Common software problems

E.     TROUBLESHOOTING

1.      Basic troubleshooting

2.      Tracing and fault finding in hardware

3.      Fault finding in software

F.     SETTING UP AND MANAGING MOBILE PHONE WORKSHOP

1.      Setting up a mobile phone workshop

2.      Facilities/equipment for mobile phone workshop.

3.      Managing a mobile phone business

Definition of mobile phones and their terminologies

Terminologies should include GSM, CDMA, mobile phones/cell phones/user equipment, MMS, SMS, call barring, call forwarding, BSI, DCT, FPS etc.

Band—single, double, tri and quad bands and their uses.

Mobile phone types—straight, flip, slides etc. and their special maintenance needs.

All phone accessories including; headsets/hands-free, earpieces, external Bluetooth, batteries, chargers, cables etc. and their functions.

Menus and sub-menus including; phone book, message, call, settings, applications etc. and their functions

Major voice service providers and their service codes.

Definition, identification and functions of various computer hardware (monitor, CPU, keyboard etc.) and software (operating and application) components.

Web access platform Including;  WAP/GPRS/EDGE/Wi-Fi/3G etc.

Browsing activities like downloading, uploading etc.

Basic block diagram (power unit, memory unit and radio unit) and functions of each block.

Identification, description and functions of various hardware components, including CPU, SIM socket, earpiece, keypad, buzzer, vibrator etc.

Various software components, both operating and application software.

Resistors, capacitors, diodes, transistors, IC, etc.

Definitions, functions, reason, advantages and procedures (cleaning, soldering, de-soldering, re-balling etc.) of preventive and corrective maintenance

Identify common tools and equipment for hardware repairs such as; star, Allen key, lead,  precision set, multi-meter, oscilloscope, computer set soldering iron and sucker etc. and their uses.

Identify common software tools for repair such as; unlocking software, flashing software firmware installation etc.

List safety rules and regulations. Safe use of maintenance tools. Basic safety facilities in the mobile phone workshop (first aid box, fire extinguishers etc.)

Identification of hardware problems such as damaged screens, charging ports, mouthpieces, earpieces, keyboards etc.

Identification of software problems such as; ‘contact service provider’, ‘phone lock code’, ‘invalid SIM’, ‘SIM card rejected’ etc.

Dissembling and assembling, testing and troubleshooting of components such as displays, speakers, vibrators, ringers, charging ports, charging jacks, batteries, keypads, panels etc.

Troubleshooting/fault finding using relevant mobile phone menus.

Identification of mobile phone ICs and electronic components.

Reading of PCB circuit layout and schematic diagrams.

Identification of faulty components (using visuals, continuity test, open circuit, short circuit etc.)

Test voltages on PCB (voltage levels at various points and voltage specification of IC pins)

Troubleshooting techniques—metering methods, signal tracing/injection, component testing, visual inspections etc.

Troubleshooting Surface Mount Devices (SMD)/ Ball Grid Array (BGA) etc.

Use of software codes for fault finding. Fault found related to software (SIM locked, SIM rejected, hanging problem, restart problem etc.)

Flashing of mobile phones—flashing devices, flashing software and their uses

Phone lock/security unlocking/resetting counters

Capital, personnel and factors that determine the choice of location

Identify appropriate facilities/equipment for a mobile phone workshop.

Risk analyses, costing, return on investment etc.

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