Rahul, even with Appsupport patched you won't get number display and callinfo.db working properly.

For instance if you call a mobile number say in lets say Bombay does your iPhone show the call is going to Airtel Mumbai/Idea Mumbai/Vodpahone Mumbai? Or if receive a call from someone does it show the location and network of where the call is coming from ie Vodaphone, Bangalore/ Airtel Chennai. That what callinfo.db does. If you call a landline in lets say Hyderabad or receive a call from Chennai it will show you that location info.

Also for me inspite of Appsupport patched, number display ie 022 26631296, +91 22 26631296 or 0 9860500000 with the gaps in the right places was not working properly hence the edits to UIPhoneFormat.plist