Is PHS answering all free?

I can tell you for sure that all PHS answers are free! As long as there is PHS, it's all the same! What's more, as the upstairs said, the monthly rent is a bit expensive. Every month in 36 yuan, I am here like this! I don't know what the monthly rent is in other places! I don't think I can exceed this number! But it is worth it! Moreover, whether PHS sends messages to mobile or Unicom, it is 0.08 yuan, which is also very valuable!