Bryan: I was told I have 96 hours. That was sixteen hours ago.
Jean Claude: Okay, first we should find the spotter.
Bryan: I found him. He's dead.
Jean Claude: You found him that way? Bryan, you cannot just run around, tearing down Paris.
Bryan: Jean Claude, I will tear down the Eiffel Tower if I have to.
Bryan: I don't know who you are. I don't know what you want. If you are looking for ransom, I can tell you I don't have money. But what I do have is a very particular set of skills; skills I have acquired over a very long career. Skills that make me a nightmare for people like you. If you let my daughter go now, that'll be the end of it. I will not look for you, I will not pursue you. But if you don't, I will look for you, I will find you, and I will kill you.
Jean Claude: I told you, I sit behind a desk now. I take my orders from someone who sits behind a bigger desk.
Bryan: Now's not the time for dick measuring, Stuart!
Bryan Mills: That's what happens when you sit behind a desk: you forget things, like the weight in the hand of a gun that's loaded and one that's not.
Bryan: [after electrocuting Marko.] You either give me what I need, or this switch will stay on until they turn the power off for lack of payment on the bill.
Bryan Mills: But if you don't get me what I need, the last thing you see before I make your children orphans is the bullet I put between her eyes.
Sam: Four hours work, 2,500 bucks just for taking some pop diva to and from her concert. We're one short.
Bryan Mills: A singer?
Sam: I don't know if you call her a singer exactly. More like a cash cow. (00:07:15)
Bryan: I have a daughter who wants to be a singer. I was wondering if you have any tips for her.
Diva: Yeah, I do. Tell her pick another career.
Answer: Actually, what Bryan Mills did was perfectly possible. He strapped a mobile phone to the two way radio, and used the other two way radio to talk. By speaking into his radio, it transmitted it to the other radio, where the mobile speaker could hear and transmit his voice. The French police would have been able to triangulate the source of the mobile phone signal from the particular 'cell' (i.e. area) that the mobile was using - while that would lead them to the phone position, he'd be elsewhere talking on the other half of the radio.
GalahadFairlight
Two-way radios have a push-to-talk button. There's no way he could operate the button remotely.