I am an existing Digi Postpaid Voice Plan subscriber, can I change my Digi Postpaid Voice Plan to Broadband Monthly 65 and bundle it with the Digi Home Router?

No, however as a Digi Postpaid Voice Plan subscriber, you may sign up to Digi Postpaid Broadband Supplementary 65 with a RM10 rebate for life and bundle it with the CPE Home Wireless router.