I bought a 2nd phone and new sim/number to use for business. Set up phone with new Apple ID, but it when I try to add my new number I get the above message.
I can’t find the new number anywhere on my other (personal) device.
See the following Apple articles: If you've forgotten your Apple ID email address or phone number
If you've forgotten your Apple ID email address or phone number – Apple Support (UK)
Sign in to your Apple ID account page and edit / update your Apple ID details.
-> edit your trusted new phone number.
This phone number is already in use with another account
Contact / visit your carrier.
You definitely have a contract with your carrier and ask if that phone number is assigned to you.
May be you have to deal with a 'cooling off period'.
It is possible that your new phone number is 'known' to Apple, may have been used/linked to another Apple ID.
Ask: what or which cooling-off period your carrier use.
An explanation of cooling-off period in my region:
There is a difference: by law there is no 'cooling off period'.
Vodafone writes in a response that original Vodafone numbers, ie numbers purchased by Vodafone from ACM (Authority for Consumers & Markets), will go back into circulation after approximately nine months; six months applies to T-Mobile. Hi and Tele2 are talking about three months. KPN indicates that there is no term, which means that 'a telephone number that becomes available today may possibly be issued again tomorrow'. The procedure after terminating a subscription is always the same, whether it concerns death or other reasons.
If necessary, contact Apple ID Support for assistance. See the Apple Support articles below for contact information.
Apple ID - Official Apple Support. -
Contact Apple for help with Apple ID account security - Apple Support. * (Link doesn’t always load)
Get Support - Work through the screens to get a chat option. You may have to pick a slightly different problem.
Apple Support schedule phone call. -
From the Apple Support article below.
Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.
This phone number is already in use with another account
