A data processing method, a communication method, a memory, a communication terminal, a communication apparatus, and a communication device are disclosed. The data processing method may include: obtaining uplink data of a communication terminal and controlling the communication terminal to turn off a communication module thereof configured to receive or transmit a first network signal which is an M-th generation mobile communication network signal (S101); and transmitting the uplink data to a communication device externally connected to the communication terminal, and transmitting downlink data received by the communication device to the communication terminal (S102), where the communication device is configured to receive or transmit a second network signal which is an N-th generation mobile communication network signal, where N>M, and N and M are both positive integers.