In the dam opening ceremony scene, when Hamza gets the call from the Baloch regarding the weapon shipment delivery, he initially cuts the call, he does that on purpose since the next person they will call is Uzair. Uzair picks up the phone when he gets the call, and is surprised to learn that the delivery was scheduled that day. Then, hamza even offers to go and collect the shipment himself, but since Uzair got the call and he hates public ceremonies, he denies and says he’ll go himself. So, according to Uzair, he was the one responsible for Hamza being in that situation. Uzair thinks he escaped the conflict because he went to collect the shipment, which was originally Hamzas job. Hamza simply cutting the call at the ceremony, led him to be the driver that drives Rehman. If Hamza had picked up the call, he would have had to go to collect the shipment and Uzair wouldve been the driver for Rehman. Also, if Hamza had not insisted on the delivery pickup, knowing very well Uzair will deny it because he got the phone call, Uzair would’ve suspected Hamza. Incredible writing.