Having said that, the silicone slinger has certainly taken its time with the X20. The chip was announced way back in May of 2015, but it has yet to hit the market. Rumors from Chinese tech block Anzhuo say that the reason for this is that the X20's development hasn't exactly been a smooth ride for MediaTek.
Reportedly, there were issues with the SoC's Wi-Fi capabilities dropping at random times. Those have now been fixed, but overheating instances have started popping up. According to the rumor, the problem is so bad that some of the manufacturers who were planning to use the chip in their upcoming smartphones have given up on it. It is unclear whether MediaTek will choose to postpone the Helio X20's production further, in order to battle with the alleged issues, or just proceed as planned. This rumor also clashes with a previous report, which claimed that the MediaTek Helio X20 is running much, much cooler than the infamous Snapdragon 810.
Having your flagship SoC labeled as being plagued by potential overheating issues should not be taken lightly. Last year, Qualcomm's Snapdragon 810 was quickly proven to throttle and heat up more than it should. The processor's name became synonymous with performance issues in the tech circles, and any smartphone that was powered by it was met with lukewarm reaction. This is probably one of the contributing factors to the success of Samsung's Galaxy S6 line – Sammy's 2015 flagships were exclusively powered by the home-made Exynos 7420 SoC, which is a fantastic performer with no overheating issues. It's also probably the main reason why LG chose to outfit its G4 with a hexa-core Snapdragon 808, instead of going for the top-shelf Snapdragon 810.
With the Snapdragon 820, Qualcomm claims that all heat issues have been taken care of, and seeing as Samsung was helping out with its production, we would hope so. But what about MediaTek – is the underdog up-and-comer about to suffer the same “overheat year” as Qualcomm did in 2015?