mobile

Hi guys, I own the international unlocked version of the One M8, but I still didn't get the Lollipop update OTA, and I decided to update my M8 manually by downloading the ROM from HTC USA website.. but I had a conversation with HTC's customers service, and they told me not to update manually cause it may brick your phone which is weird cuz many other OEM provide a manual update that works with all versions especially international unlocked version..
So is there any way to upgrade my M8 to lollipop?? cuz I can't wait for the OTA update any longer.