Issues signing in App Store
who can help me sign in AppStore
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What happens when you try?
See also the following Apple articles:
If your Apple ID is locked or disabled
If your Apple ID is locked or disabled - Apple Support (CA)
If your payment method is declined in the App Store or iTunes Store
If your payment method is declined in the App Store or iTunes Store - Apple Support
If you see a message that says “Your account has been disabled in the App Store and iTunes”
If a message says "Your account has been disabled in the App Store and iTunes" – Apple Support (UK)
See also -> Require a password for App Store and iTunes purchases
Require a password for App Store and iTunes purchases - Apple Support