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                Vodafone Finds Brits Keep Mobile Phones for 4 Years Instead of 2
 
            
            (www.ispreview.co.uk)
          
          
          
          
          
        This is a most excellent place for technology news and articles.
I've been upgrading every two years because usually they have some promo for trade ins (Samsung) so I'm getting a new battery and warranty (and slight improvement of camera) for about $200