In addition to the standard registration form, the instructions for payment through SMS are added. When user sends SMS according to the given instructions, he receives
a password in reply SMS. It is possible to complete the registration process, only upon entering personal details and the password sent previously.
On smscoin.net website, in sms:key service settings you can determine the time limit for this password, as well as the number of its activations.
Plugin designed for Discuz version 2.
Plugin designed for Discuz version 2.5