Why am I seeing an error with a valid phone number when registering for an account?

Question

When attempting to register for an account using a valid phone number, I'm getting errors:

Please do not enter country code in your phone number.

Phone number may be invalid. Valid phone numbers for United Kingdom are between 7 and 10 digits long.

Azure Free Account registration page

Answer 1

Still expriencing the same problem for Indonesia (+62).

Answer 2

I am even getting the error that my number is not valid even after writing it like this

Answer 3

same here (indonesia), this is horrible, it's like that they dont want the money