Plus code dialing in a mobile device

A method implemented by a mobile device, the method comprising:

• connecting to a wireless network in range of the mobile device;
• performing, in response to the connection to the wireless network, a set-up process to obtain state information describing whether the network supports network-based plus code dialing, where the set-up process includes accessing a table stored in non-volatile memory, the table including one or more entries that each include:
• a mobile country code (MCC) field;
• a system ID (SID) field;
• a field indicating whether network-based plus code dialing is supported;
• and
• an International Direct Dial (IDD) prefix field;
• receiving a request from a user of the mobile device to place an international call to a specified destination;
• transmitting, in response to the request from the user and when the state information indicates the network supports network-based plus code dialing, a message to the network to initiate the international call based on a network-based plus code dialing scheme;
• and
• transmitting, in response to the request from the user and when the state information indicates the network does not support network-based plus code dialing, a message to the network to initiate the international call using a handset-based plus code dialing scheme.

A method implemented by a mobile device, the method comprising:

• connecting to a wireless network in range of the mobile device;
• performing, in response to the connection to the wireless network, a set-up process to obtain state information describing whether the network supports network-based plus code dialing, where the obtained state information is obtained based on access of a table stored in non-volatile memory;
• receiving a request from a user of the mobile device to place an international call to a specified destination;
• transmitting, in response to the request from the user and when the state information indicates the network supports network-based plus code dialing, a message to the network to initiate the international call based on a network-based plus code dialing scheme;
• transmitting, in response to the request from the user and when the state information indicates the network does not support network-based plus code dialing, a message to the network to initiate the international call using a handset-based plus code dialing scheme;
• and
• in response to transmitting the message to the network to initiate the international call based on the network-based plus code dialing scheme:
• receiving a result of the network-based plus code dialing;
• and
• updating the table based on the result to indicate whether the network-based plus code dialing was successful or unsuccessful.

A device comprising:

• a wireless communication interface to connect to a wireless network in range of the device;
• a memory to store state information indicating whether the wireless network supports network-based plus code dialing;
• and
• a processing system to, in response to a request from a user of the device to place an international call to a specified destination:
• transmit, via the wireless communication interface and when the state information indicates that the wireless network supports network-based plus code dialing, a first message to the wireless network to initiate the international call, the first message initiating the international call using a network-based plus code dialing scheme, and
• transmit, via the wireless communication interface and when the state information indicates the wireless network does not support network-based plus code dialing, a second message to the network to initiate the international call, the second message initiating the international call using a handset-based plus code dialing scheme,
• where the memory includes non-volatile memory, and
• where a table is stored in the non-volatile memory, the table including one or more entries that each include:
• a mobile country code (MCC) field;
• a system ID (SID) field;
• a field indicating whether network-based plus code dialing is supported;
• and
• an International Direct Dial (IDD) prefix field.

A device comprising:

• a wireless communication interface to connect to a wireless network in range of the device;
• a memory to store state information indicating whether the wireless network supports network-based plus code dialing;
• and
• a processing system to, in response to a request from a user of the device to place an international call to a specified destination:
• transmit, via the wireless communication interface and when the state information indicates that the wireless network supports network-based plus code dialing, a first message to the wireless network to initiate the international call, the first message initiating the international call using a network-based plus code dialing scheme, and
• transmit, via the wireless communication interface and when the state information indicates the wireless network does not support network-based plus code dialing, a second message to the network to initiate the international call, the second message initiating the international call using a handset-based plus code dialing scheme,
• where the processing system additionally includes instructions to:
• calculate a time difference between a current date and a last date at which the message was transmitted;
• and
• set the state information to indicate the network supports network-based plus code dialing when the time difference indicates greater than a certain amount of time has passed.

A device comprising:

• a wireless communication interface to connect to a wireless network in range of the device;
• a memory to store state information indicating whether the wireless network supports network-based plus code dialing;
• and
• a processing system to, in response to a request from a user of the device to place an international call to a specified destination:
• transmit, via the wireless communication interface and when the state information indicates that the wireless network supports network-based plus code dialing, a first message to the wireless network to initiate the international call, the first message initiating the international call using a network-based plus code dialing scheme, and
• transmit, via the wireless communication interface and when the state information indicates the wireless network does not support network-based plus code dialing, a second message to the network to initiate the international call, the second message initiating the international call using a handset-based plus code dialing scheme,
• where the processing system additionally includes instructions to:
• receive a result of the network-based plus code dialing;
• and
• update, based on the received result, a table stored in the memory to indicate whether the network-based plus code dialing was successful or unsuccessful.

A mobile device comprising:

• means for connecting to a wireless network in range of the mobile device;
• means for performing, in response to the connection to the wireless network, a set-up process to obtain state information describing whether the network supports network-based plus code dialing;
• means for storing the state information in one or more entries that each include:
• a mobile country code (MCC) field;
• a system ID (SID) field;
• a field indicating whether network-based plus code dialing is supported;
• and
• an International Direct Dial (IDD) prefix field;
• means for receiving a request from a user of the mobile device to place an international call to a specified destination;
• means for transmitting, in response to the request from the user and when the state information indicates the network supports network-based plus code dialing, a message to the network to initiate the international call based on a network-based plus code dialing scheme;
• and
• means for transmitting, in response to the request from the user and when the state information indicates the network does not support network-based plus code dialing, a message to the network to initiate the international call using a handset-based plus code dialing scheme.