Google Pr variation by location to location, even from cites to cites too , Google SERP

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Google Pr variation by location to location, even from cites to cites too , Google SERP
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I am recently working on a domain and I have found some issues like site page rank or SERP.
The problem is site google.com is not showing exact PR from different location. When I check position from my destination it is different when other person check from other location it is different. I also used different IP addresses but the problem still remains.
Some developer says that Google has recently introduced much more obvious way to filter/refine the SERPs.


Please reply me what is the main issue and its solution.