Tracking area is a large area defined by the cellphone operator (say, Vodafone) to keep track of where approximately each phone is.
Imagine that the battery on your phone drained out and the phone switches off. You charged it and just turned it on. It is in the interest of Vodafone to know where are you in case someone wants to call you. Where should the operator look for you? Your town, your county/state, or the entire country?
This is an example of where it is nice for Vodafone to remember where you were before your phone switched off. This way, they don't have to look for you in the entire country.
You can be sneaky and turn off your phone, travel the length of your country and then turn on your phone at the other end :) In that case, Vodafone does not find you in your last known Tracking Area, and has to look in the entire country to find your new location.
Imagine that the battery on your phone drained out and the phone switches off. You charged it and just turned it on. It is in the interest of Vodafone to know where are you in case someone wants to call you. Where should the operator look for you? Your town, your county/state, or the entire country?
This is an example of where it is nice for Vodafone to remember where you were before your phone switched off. This way, they don't have to look for you in the entire country.
You can be sneaky and turn off your phone, travel the length of your country and then turn on your phone at the other end :) In that case, Vodafone does not find you in your last known Tracking Area, and has to look in the entire country to find your new location.
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