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systems
A system is a group of interacting or interrelated entities that form a unified whole. A system is described by its spatial and temporal boundaries, surrounded and influenced by its environment, described by its structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory.
Understand the working system on All Cell Phone SIM Card .....
Sample Nokia because its all systems on the basis of his work similar
At pin Simcard must consist of 6 Pin .. consisting of:
simclock
simdata
simreset
VSIM
Ground
Nc (Not Connetcetd)
all phones must be composed of six pins is...
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