GSM, CDMA, 3G, 4G Network Concept and structure
ESN, IMEI and SIM relationship, theory and concept
Determination of physical and liquid damage detection on PCB boards
Beginning soldering and desoldering techniques
Use of proper tools and opening techniques to dismantle all make and model of cell phones
Assemble and disassemble practice on straight, flip and slider phones
Phone malfunction and liquid damage troubleshooting
Change keypad input membrane & key contact corrosion repair
Data transfer & recovery
Cell Phone Unlocking - how to take carrier locks off GSM Phones