Hello Bhavin1,
Welcome to the community!
Unfortunately, the phenomenon your wife notes isn't solely an issue with Fido (see here and here). When making International calls, the calls often go through multiple exchanges before reaching your intended recipient. Some providers in other Countries charge additional costs for calls which originate from outside their border (see here). As a result, some operators may route the calls as domestic calls so billing is at a lower rate. And no, Fido is not making that decision.
In this case, the Telecom Regulatory Authority of India (TRAI) hiked the fees on incoming International calls (see here).
The International Termination Charges (ITC) is paid by an Indian International Long-Distance Operator (ILDO), who carries the call from outside of India, to the access provider in the Country in whose network the call terminates. ~ taken from here.
So the ILDO is likely routing the calls as domestic in order to avoid the additional costs. The receiving Country has complete discretion as to how they route and transfer calls to the designated recipient's provider.
If you regularly make calls to India, you might consider one of Fido's calling add-ons. The 1500 Minutes or 2¢ per minute Preferred International Rate could help reduce your bill.
You should note that this is the community forum and not intended as a venue for customer services. If you wished to discuss the matter you would need to contact customer service. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
Hope this helps 😀
Cheers
