听力原文：W: I read the instructions, but I'm still not sfire how to use my cell phone. M: Actually, it's pretty easy. First of all, don't forget to turn it on. W: Got it! M: Then dial the number. And remember to press the 'send' button. W: That's all? M: Pretty much. Just make sure to recharge the batteries every few weeks. And try not to drop it. It's fragile. W: Good advice. M: And one more thing: Be sure to pay the phone bill every month! What is the conversation mainly about?