A method for sending user data, comprising: receiving, by a first terminal, an instruction for transferring a virtual subscriber identity module, SIM, card of the first terminal to a second terminal; acquiring, by the first terminal according to the instruction, user data associated with the virtual SIM card; and sending, by the first terminal, the user data to a server, characterized in that the acquiring, by the first terminal according to the instruction, user data associated with the virtual SIM card comprises: acquiring, by the first terminal, SIM card data of the virtual SIM card according to the instruction by reading, by the first terminal, said SIM card data in a secure storage space of said first terminal; acquiring, by the first terminal, a local storage address of the user data, wherein the local storage address of the user data is comprised in the SIM card data; wherein said local storage address of the user data is an address of a storage space in which said user data is stored, said storage space being storage space of the first terminal; and acquiring, by the first terminal, the user data according to the local storage address by reading, by the first terminal, said user data from said local storage address; wherein the sending, by the first terminal, the user data to a server comprises: acquiring, by the first terminal, a network storage address of the user data, wherein the network storage address of the user data is comprised in the SIM card data; and uploading, by the first terminal, the user data to a server that corresponds to the network storage address; wherein the method further comprises sending, by the first terminal, the SIM card data to the second terminal. receiving, by a first terminal, an instruction for transferring a virtual subscriber identity module, SIM, card of the first terminal to a second terminal; acquiring, by the first terminal according to the instruction, user data associated with the virtual SIM card; and sending, by the first terminal, the user data to a server, characterized in that the acquiring, by the first terminal according to the instruction, user data associated with the virtual SIM card comprises: acquiring, by the first terminal, SIM card data of the virtual SIM card according to the instruction by reading, by the first terminal, said SIM card data in a secure storage space of said first terminal; acquiring, by the first terminal, a local storage address of the user data, wherein the local storage address of the user data is comprised in the SIM card data; wherein said local storage address of the user data is an address of a storage space in which said user data is stored, said storage space being storage space of the first terminal; and acquiring, by the first terminal, the user data according to the local storage address by reading, by the first terminal, said user data from said local storage address; acquiring, by the first terminal, SIM card data of the virtual SIM card according to the instruction by reading, by the first terminal, said SIM card data in a secure storage space of said first terminal; acquiring, by the first terminal, a local storage address of the user data, wherein the local storage address of the user data is comprised in the SIM card data; wherein said local storage address of the user data is an address of a storage space in which said user data is stored, said storage space being storage space of the first terminal; and acquiring, by the first terminal, the user data according to the local storage address by reading, by the first terminal, said user data from said local storage address; wherein the sending, by the first terminal, the user data to a server comprises: acquiring, by the first terminal, a network storage address of the user data, wherein the network storage address of the user data is comprised in the SIM card data; and uploading, by the first terminal, the user data to a server that corresponds to the network storage address; wherein the method further comprises sending, by the first terminal, the SIM card data to the second terminal. acquiring, by the first terminal, a network storage address of the user data, wherein the network storage address of the user data is comprised in the SIM card data; and uploading, by the first terminal, the user data to a server that corresponds to the network storage address; wherein the method further comprises sending, by the first terminal, the SIM card data to the second terminal.