iTunes account login doesn't work
How to Fix Your Disabled Account in the App Store and iTunes
Title in the product s shall pass to you when the product s is picked up by the carrier from our warehouse.
So you are not able to sign in consistently using Wi-Fi or cellular data if you're signing in through iTunes using the MacBook Pro or an iPhone.
I tried to help a tech support client with this same problem and there is nothing to be done about it.
Apple is known for its impressive security protocols, where it conjoins an enhanced model that interconnects all products and services involved with the device.
You can also visit the page.
Sometimes it takes several attempts but finally I am always logged in.
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When I clicked through the authorization screen, my original email address came up and asked for my password.