Android simulator. Can modify the body identification code and so on. Let the same software identify that it is not the same mobile phone, identification code or serial number when installing.

The serial number identification code is the unique identification of the device

When downloading the APP software, the software will get the device information of the mobile phone, such as the serial number MAC, etc.

so as to identify whether the device is registered

The emulator does not belong to the real machine environment of the mobile phone

The Android mobile phone is more real

Note that ROOT permission is required.