If I understood correctly the problem is that the iOS "Go" button does not submit the form. I am not sure how your current HTML looks like but I found this forum thread which discusses a similar issue.
Do you have an input of type "submit" in the form?
Once the forum is submitted and the submit event is fired you may use the validate method of the Kendo Validator to validate the user input.
I hope this information will help.
Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI