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
Why am I seeing an error with a valid phone number when registering for an account?
During account creation a number of people have received phone number warnings for valid phone numbers while attempting to register for an account. In most cases, these should just be warnings that will not prevent you from completing the form, verifying your number, and creating an account. This process is being reviewed and we are working on a better registration experience in the future.
If you receive a phone number warning for a valid phone number during account creation, ignore the warning and complete the registration.
If you are unable to use the valid phone number for some reason, fit your phone number to the example as best as you are able (dropping a leading zero, etc.) and check the "Use a different phone number to verify my identity." box. Use the correct phone number in this second phone number field for verification.
Example: If unable to enter your valid phone number, check "Use a different phone number to verify my identity" to verify your account with your valid phone number.
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