Microsoft is about to release following Bing iPhone Fixes as listed on Bing Community :
1. Using voice search outside the U.S. crashes the app.
We’ve identified that the issue relates to the region the phone is set
to. We’re working on a fix for this right now, and we’ll update the app
in the next few days. People will get the update automatically – you
won’t have to update or reinstall the app. If you are encountering this
issue you can temporarily work around it by going to Settings >
General > International and change your Region Format to “United
States.”
2. App doesn’t work on 1st generation iPod Touch. The Bing app officially supports 2nd generation iPod Touch devices, but we’re in the process of testing those 1st generation devices as well. We’ll announce support for that as soon as testing is complete.
3. No search results outside the U.S.
At this time Bing is only fully supported on the iPhone for the US; in
some regions people may not be seeing results at all. While there was a
brief period of which the Bing iPhone app was being offered in
international markets at this time international availability has been
suspended. We would like to apologize for the inconvenience and we hope
to expand our support and availability of the app in other regions in
future versions of the Bing app for the iPhone. If you are in the US or
if you are encountering this issue and or you are looking for a
temporarily work around go to Settings > General > International
and change your Region Format to “United States.”
