Seamless transition of data services in a single-sim multi-active cellular device

A method comprising:

• operating a device in a mixed technology network, the device comprising a mobile terminal having a single subscriber identification module (SIM), a first virtual terminal and a second virtual terminal, and the mixed technology network comprising a first network having a first network technology and a second network having a second network technology different from the first network technology;
• establishing a first connection between the first virtual terminal and the first network;
• establishing a second connection between the second virtual terminal and the second network, wherein the first and second connections are concurrent;
• and
• providing continuity of a service provided to the device by migrating the service between the first and second networks.

A system comprising:

• a mixed technology network comprising:
• a first network having a first technology to provide a service to a device;
• and
• a second network having a second technology different from the first technology to provide the service to the device, the device comprising:
• a first virtual terminal comprising a first modem configured to establish a first connection to the first network;
• a second virtual terminal comprising a second modem configured to establish a second connection to the second network, wherein the first and second connections can be concurrent;
• an
• a service continuity logic configured to provide continuity of the service by migrating the service between the first and second connections.