When you want to get some new Apps from the App Store on your iPhone/iPad and only to find "Cannot connect to App Store" shown you on the screen, that's can be quite frustrating. Thus it's necessary to learn what to do cope with the "Cannot connect to App Store" issue in iOS 11. The potential tips below can be applied to iOS 11 devices, no matter it's an old iPhone/iPad upgraded to iOS 11 or new iPhone X/8/8 Plus in iOS 11. Since there are various causes can lead to the problem "Cannot connect to App Store" in iOS 11, the solutions vary. Keep trying and find the fix that works well for you.
If your iPhone/iPad in iOS 11 is under the WiFi connection and the "cannot connect to App Store" issue happens, you first need to check whether it's something wrong with your WiFi connection. How to make it? Well, you can go to other apps that require WiFi networks to work or go to other devices connected to the same WiFi network to see whether the WiFi connection works properly. If not, here are the fixes to WiFi not working in iOS 11.
If you open the App Store on your iPhone/iPad in iOS 11 with cellular data on and see the words "cannot connect to App Store", you need to check whether you have enabled App Store to access your cellular data. Go to Settings > Cellular > App Store and if you see the Off option is checked, that's where the problem is. All you need to do to solve the "cannot connect to App Store" problem is to tap on the WLAN & Cellular Data option.
As you may know, this is the most common way to solve the problems on iPhone/iPad. There is no exception in this case. Besides, you can also restart or reboot your iPhone/iPad to solve the "touch screen not working in iOS 11" problem.
How to restart iPhone/iPad in iOS 11:
Method 1: Press and hold the Sleep/Wake button until a slider appears, drag the slider to turn off your iPhone/iPad completely and then hold and press the same button to turn your device on.
Method 2: Go to Settings > General > Shut Down and move the slider to turn off your iPhone/iPad completely. Then press and hold the Sleep/Wake button to turn on your iPhone/iPad in iOS 11.
How to reboot iPhone/iPad in iOS 11:
Method 1: For iPad, iPhone 6 or earlier, hold and press both Sleep/Wake button and Home button until you see the Apple logo.
Method 2: For iPhone 7/7 Plus, hold and press both Sleep/Wake button and Volume Down button until the Apple logo appears.
Method 3: For iPhone X, iPhone 8 and iPhone 8 Plus, quickly press and release the Volume Up button, quickly press and release the Volume Down button and then press and hold the Sleep/Wake button (side button) until you see the Apple logo.
Many iDevice users have proved the effectiveness of this tip to fix the "cannot connect to App Store" issue. Go to Settings > General > Date &Time, toggle off Set Automatically and manually set the correct date and time. Open App Store on your iPhone and then go back to Settings to turn on Set Automatically. Double-click the Home button and swipe up to shun down App Store. Re-open App Store on your iOS 11 device and see whether the problem has been solved.
This is a simple way you can try to fix the problem "cannot connect to App Store" on your iPhone/iPad in iOS 11. Go to Settings > [your name] > iTunes & App Store > Apple ID > Sign out and then re-sign into App Store.
If the tips above can't solve your problem, you can try this tip to fix "cannot connect to App Store in iOS 11". Go to Settings > General > Reset > Reset All Settings to reset your iPhone/iPad to factory settings.
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