Please enter Tools-Program Management-Settings-Software Installation in the mobile phone menu, select All, and close the online installation certificate detection. In addition, you can enter the software channel-Visa system. Then, you have to have the GG number (if not, please apply quickly and remember the GG number and password) and the serial number of your mobile phone (enter 15 digits appearing in *#06# on the standby desktop). 2. Enter the visa system and log in. After submitting the application, we will review it within one hour and send you a GG message after it is approved.