Mobile terminal and communication method, communication server and communication system thereof

The invention discloses a mobile terminal and a communication method, a communication server and a communication system thereof, and relates to the technical field of communication. The first mobile terminal can send the transfer request to the call server in the process of keeping the call connection with the second mobile terminal, so the call server can establish the call connection between the second mobile terminal and the third mobile terminal which establish the call connection with the first mobile terminal based on the transfer request, and the conversation between the user of the second mobile terminal and the user of the third mobile terminal can be realized. In the process of establishing the call connection between the second mobile terminal and the third mobile terminal, the user of the second mobile terminal does not need to acquire the telephone number of the user of the third mobile terminal first and then dial the telephone number for call, so the call flexibility is effectively improved. 本申