Click on the top right corner of the touch screen, and a numeric keyboard will pop up. Enter the password 7253 to enter the engineering mode. On the Casta machines on the platforms of D105 and D106, the startup sign can be modified in the engineering mode. In addition, the engineering mode provides other setting functions, such as small light control and so on.

"CAS" in the brand logo is the homonym of the abbreviation of "CAR"; "K" is the abbreviation of "KARAOKE", that is, karaoke, which stands for audio-visual entertainment products.

1, brush wizard entry method: First download and install the brush wizard, then turn on the USB for debugging, connect to the computer through the data cable, choose to find the utility after the connection is successful, and then choose to enter the recovery mobile phone to restart and automatically enter the recovery mode.

2. adb command method: We can use adb command to restart the mobile phone to recovery mode. First, we need to download adb tools, and then enter adb reboot recovery in the command window to automatically restart the phone to recovery mode.