Before you start learning of chip level repair course of mobile phones, it is very important to understand meanings of some of the important terms used during mobile phone repairing course . Read and understand these terms and their meaning. This will help you later during the course of mobile cell phone repairing in chip level.

• 1G: 1St Generation in Mobile Telephony.
• 2G: 2Nd Generation in Mobile Telephony.
• 3G: 3Rd Generation in Mobile Telephony.
• 4G: 4Th Generation in Mobile Telephony.
• AC: Alternate Current.
• BGA: Ball Grid Array.
• BSI: Battery Status Indicator.
• CDMA: Code Division Multiple Access.
• IC: Integrated Circuit.
• ROM: Read Only Memory.
• RTC: Real Time Clock.
• RX: Receive / Receiver (Receiving Section).
• SMD: Surface Mount Device.
• TX: Transmit (Transmitting Section).
• UEM: Universal Energy Manager.
• VCO: Voltage-Controlled Oscillator.
• LED: Light Emitting Diode.
• PDA: Personal Digital Assistant.
• PFO: Power Frequency Oscillator.
• PCB: Printed Circuit Board.
• RAM: Random Access Memory.
• RF: Radio Frequency.
• CPU: Central Processing Unit.
• DCT: Digital Core Technology.
• DC: Direct Current.
• GSM: Global System for Mobile Communications.
• IMEI: International Mobile Equipment Identity.

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