@tsiledak you are not the only one with this problem.
While the U10 is the device with the oldest global firmware as of now (in terms of newer devices), MX4, MX4 Pro and even MX6 or Pro 6 users suffer the same.
The last update for these devices has been released at the 23th of December 2016.
Some might be like:
Ah good old Christmas. I remember it like it was yesterday. But thats more than 5 months ago.
In your case its more than 7 months - almost enough for a baby to be born. But who knows, maybe when the firmware turns 9 months old a new one will be released ;D
However, seriously now. Meizu or lets say the Flyme team (yes, they operate independet from each other) are extremely slow when it comes down to their Global updates. It always has been like this, though it never took so long as this time. They claim to be doing tests, but most likely they are just too lazy or actually busy updating their Armada of devices.