1. certificate does not correspond to your mobile phone serial number. The question to consider is whether the serial number of the certificate you submitted is correct. If the certificate does not correspond due to an input error, a certificate error will occur.

2. The key in the signing tool cannot separate them and must be in the same folder directory.

3. The problem of signing tools and certificates should be corresponding.

4. if you can't install it, please go to "program management"->; "options"->; "settings"->; "software installation"->; "all", "online certificate check"->; "off"

5. If the authority of the software is higher than the certificate, the software signature fails and must be installed after the phone is cracked!

6. You can reapply or crack the phone.