Q: Which SMS providers are supported?
A: A total of 9 providers are supported: VatanSMS (JSON API), VatanSMS.com (XML API), NetGSM, MutluCell, KaynakSMS, İletiMerkezi, Twilio, BulkSMS, and SendPulse. Each can be independently configured from the Admin panel.

Q: Can multiple providers be active at the same time?
A: No. The system uses the single provider that is marked as active. You can switch providers at any time by activating an alternative one.

Q: Does bulk SMS sending slow down the server?
A: No. Bulk SMS delivery is processed via XenForo's background Job Queue system, so server performance is unaffected even when sending to thousands of members.

Q: Can members change their phone number later?
A: Yes. Once the admin-configured interval has passed (e.g., every 30 days), members can update their number. An SMS code is sent to the new number and the change is not saved until verified.

Q: Is the 2FA SMS feature compatible with XenForo's existing TFA system?
A: Yes. The add-on extends XenForo's built-in TFA (Two-Factor Authentication) infrastructure by adding an "SMS" method. It can be used simultaneously with other existing 2FA methods (TOTP, backup codes, etc.).

Q: Can I fully restrict forum access for unverified users?
A: Yes. Thread creation, replying, sending direct messages, and using signatures can each be individually restricted to verified members. Thread and reply restrictions can also be applied to specific forum categories.

Q: Is the add-on compatible with XenForo's permission system?
A: Yes. The add-on defines two custom permissions: "Use SMS verification" and "Bypass SMS limits." These permissions are assignable to user groups through the standard XenForo permission system.
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