As Android, does not provide anything elsethan Hangout on the new nexuses for SMS this is the originalalternative.
Do not hesitate to report any issue by leaving a 5 stars comment!
Source code : https://github.com/slvn/android-aosp-mms
Interested in beta version ?
– Join this community :https://plus.google.com/communities/116458022649785714772
– Accept the beta test :https://play.google.com/apps/testing/fr.slvn.mms
– Wait for the store to propose the beta.