answer: #Person1# didn't get #Person2#'s message last night. They find it is because #Person1# doesn't have credit in the phone.
documents: #Person1#: Why didn't you text me last night?
  #Person2#: What? I sent you three or four messages!
  #Person1#: I didn't get any of them. I was waiting for you to text me the address of where the party was and I never got your message.
  #Person2#: Why didn't you just call? I hate sending SMS messages.
  #Person1#: Well, because I didn't have any credit on my phone. I used it all up this month.
  #Person2#: I thought you had an unlimited SMS plan?
  #Person1#: I do, but if I don't have any credit in my phone, it won't let me call or send messages.
  #Person2#: No wonder you didn't get my texts!