When Monroe gets back into his car from finding out where a fight might be happening that night, he rings Nick before placing the phone to his ear, the phone's screen towards the camera. You can see that the phone isn't ringing anyone and is in fact showing the main menu of his phone (iPhone.)
When Nick and Hank are in the gym talking to Bryan, Bryan's jaw doesn't move when it cuts and they ADR in the line "I'll show you."