MediaTek announced the Helio X20 chip back in May last year and the first mass-produced samples were expected to be available to the manufacturers by the end of 2015. Elephone P9000 was the first smartphone to supposedly utilize the X20 chip, but as it turned out the phone was downgraded to the Helio P10 with an 8-core CPU.
Today AnTuTu's database gives us hope we will be seeing the first Helio X20 smartphone sooner rather than later. Apparently it will be the next Meizu flagship - the Meizu MX6. Someone probably tested the device on AnTuTu and it saved its specs.
So, the MX6, as purported by AnTuTu, will pack a 1080p display and run on the MT Helio X20 chip with a 10-core 3-cluster processor (2x Cortex-A72 at 2.5GHz, 4x Cortex-A53 at 2.0GHz, 4x Cortex-A53 at 1.4GHz), Mali-T880 MP4 GPU, and 3GB of RAM.
The rest of the rumored MX6 specs include 32GB storage and Android 6.0 Marshmallow base for the Flyme launcher.
There is still no official info on the matter, but the MX5 was among the first to utilize by the Helio X10 chip, so there is a good chance this Meizu MX6 rumor will come to pass.