A、Can receive the calls but always cut off halfway. B、Can make calls but the signal is not clear. C、Can not receive or make call

W: Good afternoon. This is Jane speaking. How can I help you?
M: Hi, I am calling in regards to a cell phone I bought from you a while back and from the warranty card it seems this is the right number to call. So anyways... I am afraid I’m going to have to complain about the reception signal on my hand phone. I can’t seem to get incoming and outgoing calls and it always gives me a busy signal. Do you know what could be the problem?
W: Could you tell me how long this has been happening? I ask that because it will likely tell me whether the problem is with your equipment or reception.
M: A couple of days ago. Initially I thought it could be the hand phone’s problem but then I realized it was probably the receiver signal.
W: please give me your number and I will check whether there is any problem on the line.
M: 9988777.
W: Thank you. Please hold onto the line and I will get back to you in a minute.
M: Sure.
W: Sorry to keep you waiting Sir. I have checked your number and everything is fine. It could be due to our line upgrading and sometimes it could affect certain mobile numbers, Our apologies for your inconvenience.
M: How long do I have to wait before the signal returns to normal?
W: Well, another couple more days. I tell you what, I will give this feedback to our technician and if the problem still exists after two days, please give us a call and we will help you to solve it.
M: Oh but you bet I will phone if I don’t get this fixed soon. It’s not as if I can do without my cell phone for very long.