Communication method and communication system

A first device, wherein a communication connection is established between the first device and a second device, the first device is making a first call with a third device, and the first device comprises:

• one or more processors;
• and
• one or more memories coupled to the one or more processors and configured to store instructions that, when executed by the one or more processors, cause the first device to be configured to:
• receive a dialing instruction, wherein the dialing instruction is sent by the second device in response to an operation of a user of inputting a target number and dialing on a interface of a first application;
• send a call request to a fourth device in response to the dialing instruction, and establish a second call between the second device and the fourth device through the first device, wherein the dialing instruction carries the target number, the fourth device is a device corresponding to the target number.

The first device of 26, wherein the first device comprises a subscriber identification module SIM card, when executed by the one or more processors, cause the electronic device to be further configured to:

• before the second call is successfully established, set the first call to call hold in response to the dialing instruction;
• display a fourth interface, wherein the fourth interface comprises a second control;
• and
• after the second call is established, merge the first call and the second call in response to an operation of the user on the second control, to form a third call.

The first device of 26, wherein the first device comprises one SIM card,

• when executed by the one or more processors, cause the electronic device to be further configured to:
• before the second call is successfully established, set the first call to call hold in response to the dialing instruction;
• send first call status information to the second device, so that the second device sends a call merging instruction to the first device in response to an operation of the user on a third control of a fifth interface based on the first call status information;
• and
• after the second call is established, merge the first call and the second call in response to the call merging instruction, to form a fourth call, wherein during the fourth call, call data between the second device and the third device or the fourth device is forwarded through the first device.