No update in my iPhone iOS 14
App Store not install to app in my phone.Why should be not updated iOS 13 &14 in my device
iPhone 6, iOS 12
App Store not install to app in my phone.Why should be not updated iOS 13 &14 in my device
iPhone 6, iOS 12
If you can't download, make purchases or update apps, including free apps, you need to update your payment method or add a new one. If you already verified that a payment method is available in your country or region and you're still having trouble, learn more.

If one or more of the following 6 options are true then you can't choose None as a payment method then the Billing information is needed . The "None" option will not appear...

Based on your country of residence and country you have selected under your Apple ID --> Payment methods that you can use with your Apple ID - Apple ...
Have you a Debit/Credit card that is issued to you that is valid internationally and is from the same Country / Region as your Apple ID.

Know it here --> If your payment method is declined in the App Store or iTunes ...
Check the following

App Store and iTunes
If you see a message that says "Your account has been disabled in the App Store and iTunes," there might be a problem with the payment method that you have on file.
When you see the message, don't try to edit any of your account information. Instead, contact Apple Support for help.
If you see a message that says 'Your account has been disabled in the App Store and iTunes'
You cannot pick and choose an iOS version. What you get is Settings > General > Software update > [All options are available here]
No update in my iPhone iOS 14