I recommend you to apply for a certificate at Ouku's signature channel. You can do it twice a day without competing with others for places. And you can choose to sign online, and you don't need a copy signing tool. Offline signature tools can also download their own signatures separately. The certificate generated here has no key.

The steps of online signature are very simple. Here's how I operate:

1. Log in to Eurocool.

2. Find the application for Saipan certificate

3. Register an account to log in under the page, and then submit the IMEI code application certificate.

4. After the certificate is generated the next day, check the certificate that has been successfully applied.

5. If the software that needs to be signed cannot be installed normally, upload the software to "Online Signature Software", click OK, it will be completed in a few seconds, and then download it to the computer.

6. Just copy the signed software to your mobile phone and install it.