What is a short message platform?

The short message platform is like a short message relay station, and the short message of one mobile phone cannot be directly sent to another mobile phone. Need platform transfer, such as mobile/kloc-0 13800XXX500 (XXX stands for area code) is mainly divided into ordinary platform and toll platform. You can apply, and you need to apply to the operator. It is more like a form of leasing, which is hosted by the operator. Users only need to pay.