Just rooted. In order to do that I was forced to remove the antivirus (avira) and firewall (comodo) from pc. The second one, also if stopped, was still forbidding in background the tool to do its tasks. Installed the gapps on the latest release of stock firmware (vers. 15). Before rooting i made all updates from ZTE. Everything is working fine but i can't enter in recovery pressing volume up/on buttons. If I try the phone hangs up with black screen and i'm forced to remove battery to wake it up. Instead the recovery starts correctly and works without any problem if I use the pc tool.
tried several times. phone vibrates, but the screen remains all black. By the way I found that my screen is made by TIANMA and also during the flashing process (rooting and installing recovery) i've seen strange screen behaviours. Anyway I still can enter in recovery only from PC tool.
You can verify this when in fastboot mode by going to
Start->Computer->right click Properties->Device Manager. There under unknown device,
you will see Android device
To solve this problem: In fastboot mode use USB Driver Tool,
click on Android device, select Change driver type and select Android ADB Driver.
Now in cmd prompt, type fastboot devices. Your device should come up.
Now you can issue fastboot flash recovery "path to recovery.img"
Regards and best of luck!
I've done, more or less, what you described.
Using quick boot rebooted the phone in bootloader. With the blank screen i checked how the device was recognized by my pc. Under Android ADB i find something like Google fastboot etc. The device seems to be correctly recognized and the driver seems installed. Then I give the fasboot devices command and the terminal says that the device ID ETC... was fastbooted, but the screen in still black and nothing appens.