Users will have to go to Advanced Settings on the device for that
Nokia’s Lumia 920 and Lumia 820, the company’s Windows Phone 8 devices, arrive on shelves with Bing set as the default search engine, the same as other Windows Phone devices do.However, it seems that it is not that difficult to change the search provider to Google, should anyone want to do so.
Of course, the process involves making a series of small changes in Internet Explorer 10 but, provided that users indeed prefer Google over Bing, that should not be too much of a problem, that’s for sure.
According to MyNokiaBlog, all that one would need to do is to go to Settings > Advanced Settings, and find the Default Search provider field.
There, simply select Google instead of Bing, and you should be good to go. This has been done for a Lumia device, but it should work just the same on other handsets too.