I can't watch it anymore. 5320 is the third version of S60 released by Nokia in the second half of 2008. Many people upstairs regard it as 5230, SIXX software only has the third and fifth editions, and sis software has the second and third editions. If the sis software cannot be installed, it is one or more of the following problems. 1.2 version of sis software, such as Magic Sound, prompts that special software, such as motion sensing software, cannot be installed, and prompts are not supported. 3. The certificate is limited, indicating that the certificate has expired by mistake. 4. The software itself has problems, damages or compatibility problems, indicating that the software cannot be accessed or installed. In addition, not all sis software and SIXX software need to be signed. More questions, qq together.