Finding location using MCC, MNC, LAC, and Cell ID

[learner71]

I know what are the values for MCC, MNC, LAC, & Cell ID. How to calculate the position in the form of latitude and longitude values?.

FYI:
MCC - Mobile Country Code
MNC - Mobile Network Code
LAC - Location Area Code; a 16 bit number thereby allowing 65536 location areas within one GSM PLMN
more info is available here on Wikipedia, Location Area Identity

Question:

1. How can I convert MCC,MNC,LAC,Cell ID into latitude and longitude values?
2. Why does Cell ID varies every time,when trying to read?

Regards
Learner

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