US Patent 11765570 Data transfer using a dual SIM phone

A first subscriber identification module (SIM) of a dual SIM device is connected to a network. A small cell is informed that the dual SIM device is a dual SIM-type device and a first radio frequency device of the dual SIM device is attached to the network. A second radio frequency device of the dual SIM device is attached to the network. The small cell is configured to treat a second SIM as a control SIM and to treat the first SIM a data SIM. User data is transferred to the first radio frequency device, a control channel switch command is sent to the dual SIM device, and control information is transferred to the second radio frequency device.