One person . One number !

Just think of this situation.You finish College and bid farewell to all your friends.Each of them have grabbed a job in a different city.And now every one is scattered across the nation.
Even before they left your mobile phone contacts list is overflowing .. With names like Rada, Rada Mob , Rada Bro, Rada Dad , Rada neighbour and so on...And then your friend leaves for training and appends your list with 2 or 3 more numbers . And then she finishes training and then another number...... And so on ..

With clumsy ppl like me the whole phone book is a "pure mess"
{ ppl who have seen me program will understand this better .... My variable names in the code wud be a1,a2,a3 or something like getlost or ohmygod .... And program names wud be ok,ok1,okgoogle....final1,final2,finaln .... }

Now why cant the service provider give us a single number and then map it to another number... So that when we either change the service provider or the package(prepaid to postpaid ) only the second number changes and the new second number is mapped onto our ORIGINAL ABSOLUTE NUMBER .

For EX : My number is 123 which is same whereever I go .. what ever package ....
It is mapped on to 1111 when I am in chennai using Airtel .. when I move to Blore and Use hutch .. it becomes 2222 ( but still mapped on to 123 )

I am sure its not all that simple .. Maybe it requires some Big changes in the protocols itself ... or Maybe then 10 digit will not do ... And there is a need to keep track of all numbers allocated ...( centrally all over the world )

Such a thing already exists ... Obv in a smaller scale ... its called wireless LNP
( Local number Portability )... But very sad na... when I really think of something ..only to find that someone has already done it ... what is left to discover ??? But Obv had ppl wondered the same way a few decades back .. I wud not be sitting and chatting here !
And if some one thinks there is a flaw ... do let me know !!!