Just short memo:
Today I checked the http://www.gsma.com/rcs/faq/lists-of-current-accreditations-for-rcs-client-manufacturers-clients. You can see there is already quite a few clients available, either as a part of OS (only Android and Windows Phone 8) or as sw client (including iOS).
Conclusion: All the “big guns” like Samsung, HTC, Nokia, Sony, LG are already including the RCS into their mainstream products. Except Apple. We will see…
Jan, ClearNet Solutions