How to change two different brands of mobile phones with one button?

Two different brands of mobile phones can be changed by one button as follows:

Tools/materials: Huawei pr4, Apple 12, ISO13.1, Harmonyos OS, and changing assistant v2.1

1. first, install the "change assistant" on these two mobile phones, as shown in the following figure.

2. then open the "change assistant" and select "receive data as a new mobile phone" or "send data as an old mobile phone" on the page.

3. If it is operated on an old mobile phone, after clicking "Send data as an old mobile phone", you will be prompted to install the change assistant on the new mobile phone, and there is a QR code for scanning code download. If it has been installed, click "Next" at the bottom directly.

4. if it is operated on a new mobile phone, after clicking "receive data as a new mobile phone", the mobile phone will generate 4 digits, prompting you to enter these 4 digits on the old mobile phone.

5. After successfully entering the connection code, the data to be sent will appear on the old mobile phone. You can choose to upload contacts, call records, text messages and other contents, scroll down, as well as system settings and applications, select all the contents you want to transfer, and then click "Start sending".

6. after the transmission is completed, the mobile phone will prompt that it has been completed, and display the content and quantity of this transmission, and then click "exit the replacement assistant".