Patent ID: 8676156
Filing Date: 2014-03-18
Classification: H04M

Abstract:
1. A method to manage a call in a communication system comprising: receiving, by the communication system, a call request for a voice call from a first device to communicate with a second device, wherein the second device is a subscriber of the communication system; and transmitting, by the communication system to the first device, a first message comprising an indication that the second device is operating in a text message-only mode, when the second device is roaming and a roaming usage of the second device meets a roaming criteria, wherein the roaming criteria comprises the second device having a roaming usage during a previous billing period above a first threshold roaming usage and having a roaming usage during a current billing period above a second threshold roaming usage, and wherein the first threshold roaming usage and the second threshold roaming usage are based on a subscription term of the second device's subscription with the communication system.