Major smartphone websites, such as pickled pepper 3G Baosoft Saipan, have certificates. You can apply for a number there, which is actually a mobile phone number, then enter your mobile phone serial number and log in and download it the next day, then decompress it with X-P, put it in the folder you can find, then sign the software freely, and find the folder with certificate in the last two lines of the settings after opening. You can sign the software by setting the certificate and key. It's better to download a one-click cracking software named HELLO, open the phone and automatically help you crack it, and then all the certificate problems will be solved. I worked hard to type it word by word, and I hope LZ can adopt it.