Which SMS verification code works well? The company has just developed an application that needs to be stabilized. I come from Nanchang.

The function of verification code is generally done by yourself, which is not difficult. There are ready-made codes on the Internet, so you can copy them down and change them yourself. I don't know much about the ready-made third-party functional framework. Nothing more than buying a short message service, which all mobile operators have. Or you can directly ask operators such as China Mobile and China Unicom.