"My battery is almost dead."
"I think there's a problem with the network."
"I can't hear you very well."
"Sorry about that. I just went through a tunnel."
"I think we got cut off."
"I need to charge up my phone."
"We seem to be breaking up."
"Can you speak up? The line's not very good."
"We seem to have a crossed line."
Can you hear another person?
"I'd better call you back later."
"The signal is very weak here."