Are all the phone calls made during Evans's exam made by a fake governer?? If yes, then where was the real governer as Jackson mentioned that the governer himself will be listening to the conversation during the german exam..

Dear student,
All the phone calls made during the examination were by the real governer himself. The Governer was befooled by the genius planning of Evans and his team. The governor himself was used as a tool by them to convey important information regarding the escape and also he was the one who provided them with the final escape van.
There was no fake governer.
Regards