Look at the note below. You will hear a man calling to complain. Message Receiver: Shanghai (9)______ center Fault

A: Nokia Shanghai after-sale service center. What can we do for you?
B: Hello. I am afraid there is something wrong with my cell phone.
A: I see. We offer a variety of maintenance services to increase performance and lifespan of your Nokia products. Can you describe the failure briefly?
B: I cannot see anything from the screen.
A: Sounds not that serious. In most cases your screen need a professional cleaning, due to the increasing dust.
B: I am afraid my cell phone is out of warranty.
A: In case it is out of warranty and you wish for it to be repaired, please come to us for a free cost estimate. But professional cleaning should be charged.
B: OK. Thank you. I will come to you tomorrow.
A: You are welcome. Bye.