Lucas' mobile

Just wondering, who else noticed a flaw when Lucas called on someone to check on Frances in the first part??? He opened up his Motorola and he pressed 2 buttons and his call connected. But for those of you who own a Motorola, if you listen carefully to the sound that was emitted when he pressed the two button, it is the same sound as when you press the red No button on the phone! SO it means that he pressed No, and No again to call someone! (i.e he didn't really call someone!) LOL! how cheapy. did anyone else realise?