For people without GSM coverage, SMSPassword allows two-factor authentication with a time-based token system.
This system can co-exist in a SMS setup, or as separate system.
For the end user, this means the same easy to use login experience;
User log’s in with AD username and password
User takes smart phone, and sees the current token
User enters the six digit number (token) as second factor
More information in the manuals section.
The SMSPassword Token Mobile Application is available for Android and iOS.