Messages cannot be transferred from HTC M8 to S6 with Smart Switch. How can I transfer messages from my M8 to S6?

[AC Question]

1. Messages cannot be transferred from HTC M8 to S6 with Smart Switch.

Tried to transfer all data from my M8 to S6 Edge using Smart Switch. Contacts, calendars, apps, pictures, videos and etc, no problem. But none of the messages were transferred. Are there any other means that I can transfer the messages from my M8 to S6?

Thanks!