If your iPhone asks you to confirm your phone number when you're trying to activate it in the US. – Apple Support (UK)
Block phone numbers, contacts and email addresses on your iPhone or iPad – Apple Support (UK)
Check your Apple ID device list to find where you've signed in – Apple Support (UK)
How to Change Your Apple ID Phone Number [5 Methods] | Beebom
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Change Phone Number Format - Apple Community
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Change your Apple ID - Apple Support
Find the serial number or IMEI on your iPhone, iPad or iPod touch – Apple Support (UK)
Sign in with your Apple ID – Apple Support (UK)
How to Change Apple ID Email, Phone Number, Password and More
Change Phone Number Format - Apple Community
I am trying to change my region to UK for my Apple ID but I do not understand this phone number format. Can someone help? My home number is +44 ##### ###### (
Breach in my iCloud account phone calls - Apple Community
Add or remove your phone number in Messages or FaceTime – Apple Support (UK)