Phone Number Validation Mask
This validation give error if field is empty and if number is incomplete.
<label for="PhoneNumber">Cell Number:</label>
<input type="text" data-role='maskedtextbox' data-mask="9999-9999999" id="ContactNo" name="ContactNo" data-validmask-msg="Phone number is incomplete" required="required" />
<span data-for='PhoneNumber' class='k-invalid-msg'></span>
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