It will still require the field, just won't force a US format if you remove the pattern. With all of the variations on phone numbers across the world it would be difficult to find a pattern to encompass them all, but you can look on a site like: http://www.regexlib.com
That sounds like it may be a bug in Microsoft Edge. Microsoft Edge is still basically in a beta stage and can have issues that Microsoft will be resolving before the formal release when it eventually replaces IE.
Did this help? Tips are appreciated...
