When Nancy calls Andy in the restroom on her iPhone 3G/3GS, the phone stays lit even after putting it to her head. The iPhone is designed with sensors to turn off its display when put against one's head during a phone call.
When Pilar and Esteban are talking, the subtitles say that Esteban is drinking the afternoon; however, Pilar says "manana," which means "tomorrow" or "in the morning."