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.

The steps of signing online are super simple, which I have always done:

1. Log in to Eurocool.

2. Find the application for Saipan certificate

3. Register an account to log in under the page (you can always use the same account after registering once), and then submit the IMEI code to apply for the 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, you will be prompted that the certificate is wrong or expired. Go to the "online signing software" to upload the 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.

Isn't it super simple and easy to use ~ I tried it once to ensure that you can easily get your mobile phone signature, haha! !