[1] It is a custom ROM for smartphones and potentially tablet devices.
Smartisan OS was unveiled on March 27, 2013[2] at the China National Convention Center.
It will compete with MIUI from Xiaomi and Flyme OS from Meizu in the Chinese cellphone market.
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.
[4] A year later on August 26, 2015, the Smartisan U1 was announced, with Smartisan OS 2.0 taking on the likes of OnePlus 2 and Meizu M2 Note.