Approve This iPhone
After turn on two facto authenticaction there is a message appears under iCloud account asked me to update my Apple ID. And when I press on it asked my password then I use my password then asked me to unlock my iPhone then I stuck on a screen told me waiting for approval. That messa has a title APPROVE THIS IPHONE. And there is a message under it “go to one of your other devices sign in to iCloud to approve this iPhone“. Advice please.
iPhone 7 Plus, iOS 11.3, Two factor authentication