cust: I just want you to replace my phone
me: I can look into replacement options for you, what seems to be going on?
cust: when I call my friends they cant hear me
me: Thats not good. Do you have the phone with you so we can look at a few things
cust: Yea, I am talking to you on it.
me: well sir, it seems to be working, I can hear you very clear.
cust: I dont think you can hear me, your lying!
me: (face palm)