What is the conversation mainly about?

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!