App Store can not open to set up DNS to resolve, it is recommended to use 8.8.8.8 to make changes, which is a temporary solution
Method ①: Modify DNS.
1 if we turn on the "set-wi-fi" of the iphone and then we click "I" on the back of the WiFi you connected, as shown below:
2 so you will see in the WiFi interface there is a "DNS", modify DNS for: 8.8.8.8 or 114.114.114.114 as shown in the picture, just fill out don't ask why
3 Quickly press the home button, close the App store backstage, back into.
Method ②: Modifying system time
1 We look in the mobile phone "set-general-date and time" as shown in the following figure.
Turn off automatic settings and time to yesterday (24th) or before. As shown in figure:
2 and then we exit the App Store backstage, and then re-enter the app, and you'll find that it's opened successfully.
PS If you still can't open the App store it is estimated that there is something wrong with the App Store server and we can wait and see for a while.