In the world of telecom, a bill shock is the surest way to lose your customers. You can do everything right, from creating the perfect plan to delivering your services as per expectations, but if your billing is not in place then you are in a world of trouble. Especially for small-scale MVNOs that thrive on supporting small customer bases, an inefficient billing system can sound the death knell for their business. The biggest reasons why many billing systems fail is due to the inefficiency of the OCS. Hence, it makes all the more sense to fix the problem at its source.