[nibb]

I like your idea, and Im using SMS and phone verification for other projects.

But I see some limitation in your plugin. It only works for paid subscriptions.

I would like to use SMS verification on forum user sign up.

And or to manually check a user with SMS.

This means, this 2 basic options are missing.

Option 1.
Activate on user sign up. Every user that registers needs to input their SMS pin on sign up.

Option 2. Manually verification. As an admin you can send a SMS manually from the admin control panel, and the user can log into his account and verify his account. Manual verification.

Users verified should go to their own usergroup. Optional.

Also, are you a reseller? Like using Clickatell for SMS and Telesign for the voice verification or do you have your own VoIP service which makes the calls? I mean it would make sense to you to cut out the middle men to lower your phone calling fees using VoIP providers directly and sms gateways.