More information would help. Are you not getting a code on the iPhone 7? Are you using the same Apple ID on both phones?
Apple ID - Get a verification code and sign in with two-factor authentication
More information would help. Are you not getting a code on the iPhone 7? Are you using the same Apple ID on both phones?
Apple ID - Get a verification code and sign in with two-factor authentication
im trying to approve my iphone 6s from my iphone 7puls but its not letting me