Complex sentence: The first public beta is available from June 15,2013 and it will initially be compatible with Samsung Galaxy S III plus a few other devices, followed by Smartisan's own hardware next year, after which no third-party devices will be supported.
Split into simpler sentences: The first public beta is available from June 15,2013. It will initially be compatible with Samsung Galaxy S III plus a few other devices, followed by Smartisan's own hardware the following year, after which no third-party devices will be supported.