The solution steps are as follows:
Enter TWRP.
Click Settings.
As shown in the figure, uncheck the Zip file signature verification.
Precautions for brushing machine:
1. It's intuitive and important to ensure that the battery is sufficient when you brush the machine, because if the phone dies in the middle of brushing, you will be sentenced to death. If there is still no warranty, you can only go to the mobile phone repair office to spend money to write the code.
2. There will be a period of time to write the original data of the mobile phone chip after the brushing starts. You need to wait a few seconds. Don't think that there is no response. Please be patient.
3. After the progress bar appears, don't touch the mobile phone and data cable to avoid unnecessary trouble. Here, I would also like to remind everyone that the computer had better be in a leisure state, and don't run too many programs to cause the computer to crash.
4. Number four. After brushing, CDMA mobile phone will restart. Don't worry too much if it doesn't restart. Let's see if we can open it manually first. If not, there is still salvation. You can remove the battery and re-enter the brushing state. If you can pass the exam, you can brush it again.
Here I have to mention the music box that is convenient for players to change big bells. His idea is that you don't have to brush the entire BIN file.