What is a mobile phone certificate? The mobile phone certificate is only for S60 3rd mobile phone, which is what we usually call S60 third edition mobile phone. The S40 and S60 first and second edition mobile phones do not need to apply for a mobile phone certificate. The S60 3rd mobile phone uses Symbian's OS9.1 0S9.2 and 0S9.3 systems. This mobile phone system greatly improves the security of the mobile phone and can effectively prevent harmful mobile phone files, such as viruses and Trojans, from invading your mobile phone. Cause unnecessary losses to you. Everything has advantages and disadvantages. The third version of the S60 mobile phone has enhanced the security of the mobile phone, but it also brings a lot of inconvenience to our daily installation of mobile phone software. Because software that has not passed the mobile phone security system certification will be regarded as harmful software and the mobile phone software cannot be installed. Symbian officials provide a way to pass the security system authentication of mobile phones by applying for a certificate file suitable for their own mobile phone IMEI. However, because Symbian officials stopped applying for certificates on personal mobile phones, this caused a lot of inconvenience to the majority of mobile phone players. Symbian currently only allows large customers and third-party software development customers to apply for mobile phone certificates. We need to purchase a high-authority PID file issued by Symbian to apply for a mobile phone certificate. The high-authority PID provided by the official is expensive. . Now, as a registered member of IT168 Nokia Forum, you only need to reply your mobile phone serial number to our serial number collection post, and we will apply for a safe installation certificate file for your mobile phone for free. What is a mobile key file? A lock is matched with a key, and a certificate file will also provide a key to open the certificate. This is our key file. This key file is unique. The key file we provide can only be opened in The certificate file we apply for here. The key file and the certificate file are used together and one is indispensable. The unified key file of this forum can be obtained in the signature tutorial of the top post. Certificate usage process: 1. Members provide their mobile phone serial number (IMEI) to the IMEI collection post. 2. We will summarize the mobile phone serial number you provided, and then go to Saipan official website to apply for a certificate. 3. After the certificate is issued, members download the certificate file belonging to their mobile phone, and then use the key file to sign a third-party software that has not undergone any signing operation. (See the pinned tutorial post for the signature tutorial) 4. After the signature is completed, a new installation file will be generated. You only need to copy the newly generated installation file to the phone storage for installation.