Flashing 101 aka cdma termanology

Welcome to Flashing 101
This will help you understand some of the basic terms used in phone flashing.

Flashing vs. Unlocking: The technical meaning of flashing is rewriting the Firmware (software) to a phone. Although it is more commonly used when referring to changing a phone’s settings so that it works on a different provider’s network e.i. Verizon to Cricket, Sprint to Metro PCS… ect.
Unlocking means entering a specific code into a GSM phone so as it will accept a different providers SIM card to be used on that network. We will not be discussing this in this section.
TDMA: Time Division Multiple Access/Digital AMPS- This 2G technology and has been basically phased out.
CDMA: Code Division Multiple Access- This is the network in which it’s phone’s are programed

GSM: Global System for Mobile Communications- This is the network that uses Sim cards

ESN: Electronic Serial Numbers- The Serial number dedicated to each phone

MEID: Mobile Equipment Identifier-This also is the Serial number dedicated to each CDMA phone but in a different form. Can Be seen in HEX (hex decimal) and DEC (decimal) form

(pESN): pseudo ESN- a newer form of the ESN links to MEID
IMEI: International Mobile Equipment Identity- The serial number used in GSM phones
NOTE: The ESN, pESN, MEID, and IMEI are all the same thing just written in different forms
PRL: Preferred Roaming List- This lets the phone know what network to connect to

SPC/MSL: Service Programing Code/Master Subsidy Lock- This is a 6 digit code used keep the average phone user from programing the phone. Some providers have codes that are specific to each phone based off of the ESN e.i. Sprint, USSC. Other providers use a universal code e.i. Verizon uses 000000, Cricket uses 333333.
SID: System Identification- Determines which towers to go off of.
NOTE. if the PRL and SID do not match up the the phone will stay in roam or get no service
NID: Network Identification- This number usually does not need to be changed
MDN: Mobile Directory Number- The phone number that is dialed to connect
MIN: Mobile Identification Number- This number is used by the system to identify the phone
NOTE. This number does not always match the MDN
MMS: Multimedia Messaging Service- Picture messaging

WAP: Wireless Application Protocol: This is the phones mobile web

MIP: Mobile IP- This is the the IP gateway settings used to connect to the web

ERI: Enhanced Roaming Indicator
EVDO: Evolution-Data Optimized- This is used to enhance Mobile web
BIN: Binary file- In phone flashing the bin refers to the firmware(software) for a phone
Monster File: This is basically a bin file used for Motorola phones
ROM: This is a bin file used for PDA’s
OTA: Over the Air Activation- Done by dialing *228, *22804, or *22808
NAM: Number Assignment Module-The section of phones designated to Number Assignment, PRL, SID, NID… ect
These are basic terms you should know before perusing any phone flashing endeavor.

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