I install original UT4 v.2.0.0.img (from Ugoos page) on my Z4 device. Everything works fine, except power button which has to be hold all the time or device turn off.
Temporary solution is connecting OTG micro usb to USB port in for example TV- then device is working all the time OK.
I try Yablar 1.5 MOD img but device doesn't turn ON

Maybe someone find the solution for Power button ?
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