1. Download the certificate and sign the software.

2. Double-click the file to run "DOSPY Signature Tool", a blue screen will appear, and then just press a key on the keyboard.

When the above picture appears, press any key, a "Instructions for Use-Notepad" document will appear, and then close the document.

After the above steps are completed, it means that you have installed the signature software, and the next step is to import the certificate.

3. Step 4: Right-click the certificate (the file on the left) and select Import Certificate (Replace).

After importing the certificate, a black command box screen will appear, just click a key on the keyboard.

Doing the above means that the signature software and import certificate have been successfully installed.

The next step is to sign the software. Just right-click the software to be installed on your phone and select "Sign this file". Only (. Sister and. Sisx) files can be signed, and nothing else can be done.

After signing, a signature folder will be automatically generated.

After that, you can use data cable or Bluetooth or memory card. Anyway, no matter what method you use, just copy the signature file in the folder to another folder on your mobile phone, and then find the file you just copied in the menu-Tools-File Management-Other folder on your mobile phone and install it. Please pay attention to the time of the mobile phone when installing the software on the mobile phone to avoid the problem that the certificate has not yet taken effect.