What's "No service"? Is it general expression?
Native speaker’s answer
Rebecca
"No service" means that your cellphone doesn't have any signal; you cannot make phone calls nor can you send text messages. It is a common expression. In America, there are many small towns and because of that, cell phone service isn't always great. Ex: Shoot! I have no service! How am I supposed to tell her where I am? Ex: I don't have service in Marshall so I will have to call you later.