Joke Collection Website - Public benefit messages - What is the short message service center on the mobile phone for?

What is the short message service center on the mobile phone for?

It is a similar server transfer station for operators. What you see is a number of +86. The text message you send on your mobile phone must go through this number to reach the other party's mobile phone, so this number cannot be changed. Many people ask that mobile phones can't send text messages because they have changed this number privately.