The name "4K" is derived from 4kilo ("4000"), which indicates the approximation of its approximately four horizontal pixels of resolution; the fact that the name describes its horizontal resolution is the exact opposite of his predecessors: 720p and 1080p (which had been called for such agreement) in fact indicate the number of pixels on the vertical axis. Under the agreement earlier, a 4K UHDTV would be equivalent to 2160p. For new smartphones with display 4k: ZTE STAR 3, Galaxy Note, Panasonic ToughPad