When the protagonist arrives at Delhi IIT to demonstrate his machine, it is carried in the roof carrier of a taxi in a seemingly smaller box. But given the size of the entire machine shown earlier (almost occupying a whole room), it cannot fit in a taxi, let alone that small box.
When Akshay gives his UN speech, the signals in the background remain red throughout.
Akshay hurts his finger but bandages his hand.
The film is set in 2001, but Sonam uses a present-day smartphone.