Try the following steps. Using mobile phone data to surf the Internet, you can check whether the mobile phone can open other web pages or applications normally. If you use WIFI to surf the Internet, you can check whether the WIFI network can connect normally and visit other web pages. You can restart the wireless router, then go to iPhone settings to delete WIFI, and then rejoin WIFI. If not, you can try to restore the network settings. Path: Settings-General-Restore-Restore network settings, and the device will be restarted. If the access restriction is set by the mobile phone, you can reset the access restriction attempt, and the path is Settings-General-Access Restriction. Turn on the access restriction for 5 seconds, and then turn off the access restriction.
There are two login methods for Shi Sheng Tong, one is to download Tong software to log in, and the other is to follow the official account of Tong WeChat on WeChat.