Apple Event: May 7th at 7 am PT
"Could not sign in" It's always show like this when I'm logged in my apple ID account. I can log in with my computer and I can logged in my friend apple ID account but on my Iphone 6s I can't logged in after I updated to ios11. 😟
iPhone 6s, iOS 11.0.1
I solved the same problem.
1. enter 'App Store' app.
2. try to log-in at the App Store app.
3. You can see a different Apple ID in the App Store id section. I will call the ID as X.
4. press home button.
5. enter 'control'-'iTunes and App store'.
6. enter X id and X password at the Apple ID. You have to know the X password.
7. tap Apple ID and logout.
8. enter your id and password what you want to use at the Apple ID.
Finally, you can log in with your ID.
Have you tried settings>general>reset>reset network settings?
I tried but It's not work 😟
Fixed? Get the same issue here :/
Could not sign in App Store
