Enable Cortana for every phone without Jailbreak using Fiddler
Modify the time to next month on your phone
Set proxy address to your Fiddler
Tap Search key on your phone
Look for the request to rwsettingblue.xml, websearch.exe use it to generate BingConfiguration_**-**.xml
I'm lazy to write how to write script to modify this file, but you can find similar thing from marass82's post
I think these information is enough for every developpers.
You can always modify time on your phone to make websearch.exe request new xml from bing.com
I don't know the exact expiry time of this config xml cache (Maybe it will expiry within 1 day), but set one month ahead is enough and can ensure it update.
HTC Touch Pro->HTC Mozart->HTC HD7->Dell Venue Pro->HTC HD2->Lumia 800->Lumia 720T->Huawei W1->Lumia 822->Lumia 525
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