How to configure EAP-TLS OTA

Hello, I am trying to configure wi-fi setting OTA on iPhone/iPad. The certificate enrolment goes thru fine and the device signs the final request with newly acquired certificate. I am stuck in the last phase i.e. pushing the final mobileconfig containing EAP-TLS setting. It seems the configuration is accepted even though it is not signed or encrypted. Also, the configuration includes the root CA certificate which issued the device certificate as well as identity certificate (which is the newly issued certificate) for EAP-TLS setting . The device complains about not able to connect using the pushed profile. Is it okay to send root CA certificate in the mobileconfig and will it be trusted? Also, what is the encoding format for the certificate?

Thanks for any help.