Please log in to 3g.cn website with your mobile phone, go to the homepage of the website and click Community to enter the software channel -S60V3 | S60V5 | UIQ User Certificate Application. Log in with GG number and GG password, and then enter your mobile phone serial number to enter the certificate application (the mobile phone serial number can be obtained through *#06#). Generally, the system will prepare the certificate for you 1 working day after submission. You can enter the current page at any time to query the progress of voucher preparation. After passing, you can enter the serial number, click the serial number of the mobile phone, and return to the software channel to download the signed version of the software. At the same time, you can download the certificate and realize the online signature of the mobile phone.