I'm not able to sign in to my App Store using my Apple ID. What should I do?

Review these documents if you think they apply:

Click on this link "If you can’t download or update apps on your iPhone or iPad " --> https://support.apple.com/HT207165

If the first 5 don't help, use the 6th.

Considerations:

Do you have the same problem when using a different Wi-Fi network?

Does restarting your device make any change?

Can you download apps normally on another device?

If a feature on your device is not working, it may have been disabled. See how to 'Use Screen Time on an iPhone, iPad, or iPod touch' by clicking here --> https://support.apple.com/HT208982 Go to: Content & Privacy Restrictions > iTunes & App Store Purchases

If instead you see a message that says "Your account has been disabled in the App Store and iTunes" click on this --> https://support.apple.com/HT208856

Resolve issues between iTunes and third-party security software - https://support.apple.com/HT201413 - You can’t connect to iTunes Store to buy or download content.

If you see 'app needs to be updated' after updating to iOS 14.5, click here --> https://support.apple.com/HT212310

Have you entered a payment method? This document explains how to 'Change, add, [review,] or remove Apple ID payment methods' on an Apple mobile device, a Mac, or a PC; click here --> https://support.apple.com/HT201266

Apple Recommended article by ASC contributor Urquhart1244 --> https://discussions.apple.com/thread/8434425 with various suggestions about network, payment and log-in issues.

Check Apple's system status --> https://www.apple.com/support/systemstatus

If you can't connect or sign in to iCloud --> https://support.apple.com/HT203512

"If you can't connect to the App Store, iTunes Store, or Apple Books" click here --> https://support.apple.com/HT201400

- If none of the suggestions work, try the last one: "If you’ve tried all of the above steps and you still can’t connect, contact Apple Support."

Click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232