Nubia z5s nx503a cant boot recovery

Jul 11, 2014
Hi i want to help me, I have nubia z5s nx503a and i was running miui 4.6.27 and i flash miui update, after flashing the rom the phone stuck after nubia logo, i try to boot with volume up+power to recovery and it cant boot i only see a white blinking screen and then restarts. i try to flash recovery again from pc but every script i try cant flash, i think lost root previleges and the pc find the phone as android sooner single ADB interface, i try also qspt and i can see the internal memory. If anyone can help me..plz thank you.