How to install the certificate in your iPhone and iPad
Root Certificate (this is the new version for iOS 9)

Installation instruction are here
  thawte DV SSL CA certificate
Issuer: thawte Primary Root CA
Date: 10/18/2004 - 10/17/2014
Valid to: Monday, February 17, 2020 7:59:59 PM
Subject: CN = Thawte DV SSL CA, OU = Domain Validated SSL, O = Thawte, Inc., C = US
This certificate is needed to install the Thawte® SSL123 Certificate.
Installation instruction are here

Timestamp: 11/18/2018 12:18:15 PM EST [on srv7cps]
© 1996 - 2018 STDI Consulting Inc.
All Rights Reserved