Abstract: A method of call implementation. The method includes: in response to detecting an incoming call event sent by a calling device, sending, by a called device, a status message of the incoming call event to a relay device to enable the relay device prompts the incoming call event according to the status message; and after receiving a response message for the incoming call event from the relay device, transmitting, by the called device, audio data through an audio connection between the called device and the relay device to implement a call between the relay device and the calling device.

Abstract: A method for a call, includes: determining, by a terminal, a call request, where the terminal is installed with a first SIM card and a second SIM card, and the call request is configured to trigger a concurrent call based on the first SIM card and the second SIM card; and performing, by the terminal, a call processing for the first SIM card and the second SIM card based on the call request.

Abstract: A method of call implementation. The method includes: in response to detecting an incoming call event sent by a calling device, sending, by a called device, a status message of the incoming call event to a relay device to enable the relay device prompts the incoming call event according to the status message; and after receiving a response message for the incoming call event from the relay device, transmitting, by the called device, audio data through an audio connection between the called device and the relay device to implement a call between the relay device and the calling device.

Abstract: A method for controlling communication of a terminal device is provided. The method includes: receiving supplementary item setting information, detecting statuses of an internet protocol multimedia subsystem (IMS) and a UT interface in response to the supplementary item setting information, performing setting of a supplementary item via a packet switch (PS) domain when the IMS in a registered status or the UT interface in an accessible status, and performing the setting of the supplementary item via a circuit switch (CS) domain when the setting of the supplementary item cannot be performed via the PS domain.

Abstract: A background display method during a call includes: obtaining information on the call; and dynamically displaying a background image on a call interface based on the information.

Abstract: A call management method includes: detecting a call type of a call; starting a call management interface corresponding to a current call type, when the call type of the call is changed. The management of the user interface of the conference call can realize flexible switching and changing of the interface when participants of the conference call change.

Abstract: A method for controlling communication of a terminal device is provided. The method includes: receiving supplementary item setting information, detecting statuses of an internet protocol multimedia subsystem (IMS) and a UT interface in response to the supplementary item setting information, performing setting of a supplementary item via a packet switch (PS) domain when the IMS in a registered status or the UT interface in an accessible status, and performing the setting of the supplementary item via a circuit switch (CS) domain when the setting of the supplementary item cannot be performed via the PS domain.

Abstract: A background display method during a call includes: obtaining information on the call; and dynamically displaying a background image on a call interface based on the information.

Abstract: A call management method includes: detecting a call type of a call; starting a call management interface corresponding to a current call type, when the call type of the call is changed. The management of the user interface of the conference call can realize flexible switching and changing of the interface when participants of the conference call change.

Abstract: The disclosure provides a method, device and system for unlocking a mobile terminal by an operator. The method includes the following steps. An operator device receives an unlocking request from the mobile terminal, wherein the unlocking request carries unlocking identification information; the operator device determines to allow the mobile terminal to unlock according to the unlocking identification information, and according to the unlocking identification information, queries a cryptographic key list database pre-stored in the operator device to obtain an unlocking cryptographic key; and the operator device sends the unlocking cryptographic key to the mobile terminal to ensure that the mobile terminal carries out the unlocking according to the unlocking cryptographic key. According to the disclosure, the problem of relatively poor safety of unlocking by a mobile terminal under the control of an operator is solved.