In case your access number is not working, please check your caller ID settings.
Our systems recognizes you as a customer with your primary phone caller ID, in case you have some privacy settings or you have blocked your caller ID, you wont be able to make calls. In some exclusive cases, If you are subscribed with such a plan which is a roaming free plan, your local access number may not recognize your caller ID and please try any access number away from your zone.
The list of access numbers is available at http://unlimitedindiacalling.com/coverage.php