BASIC COMPONENT, ANDROID MOBILE REPAIRING,COMPONENT FAULT & SOLUTION, CIRCUIT DIAGRAM, BATTERY PROBLEM & REPAIRING, SIM & RUIM CARD, MEMORY CARD PROBLEM, NETWORK PROBLEM, CHAINA MOBILE IC, PA, ANTENNA SOKET, ANTENNA SWITCH, KEY PAD IC, SIC DRIVER IC & MEMORY JUMPER, MOBILE SHORT, TEST POINT, TOUCH SCREEN, DISPLAY REPAIRING CONCEPT, JUMPER CONNECTION PRACTIC, BALL MAKING, DIGITAL POWER SUPPLY, SOFTWARE, SAMSUNG DIAGRAM & FAULT FINDING, WITHOUT BOX FLASHING, TAB REPAIRING, SPL. TIPS, EXMP..