Meizu MX5

Hey guys , i am the proud owner of an MX5 M575H from TCCM unfortunately :) . My OS version is 4.5.4.1 I . I am facing a strange problem when i’m trying to activate super mode from Security app . My phone is permanently in 3G mode . When i turn on super mode , my signal is lost , the X appears on the signal bar , so i can’t use my phone at all . When i’m exiting the super mode , i realized that it switches automatically to 4G . 0_1450258980552_S51216-114209.jpg