Urgent! ! ! ! ! ! ! ! The suffix of the short message is "-From to Hu", and the sender number is a bit strange, which is 001631370 * *. What software is it?

Your friend may be abroad. According to your description, this is a letter from a foreign server. After network encryption, the number is not the original real number. This number only means that it was sent through the network. Just like answering a phone call from abroad at home, only the same network code is displayed, but the address is correct and you can reply.

Even in China, short messages are transmitted through network servers. Maybe he used it on a computer, such as the pc suite of a mobile phone or something. I think I've made myself clear. If you don't understand, you can ask the customer service of the mobile phone operator.