Note: Please Root the phone under original system.

Download the tool to the phone first: https://drive.google.com/open?id=0Bw2ZA9BUygkBdklfSWFBZ2dTTXc OR http://pan.baidu.com/s/1hsJdeDm

1. Brush into the Recovery:
a. Input *#7678# on the dial interface of the phone, choose both the two as the next; Connect the computer with usb data cable, open USB debugging

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b. Run the file you download

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c. Input "1" - Enter : brush into recovery driver

d. Input "2" - Enter : brush into recovery (Keep the screen bright, pop-up choose "allow")

e. automatically enter into recovery, then "slide allow to change"

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2.Click on the following steps(the red box shows) after it automatic enter the phone
High class ——Silent star toolkit——gain ROOT permission——slide button to confirm ——reboot system

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3. Install Google Play Store: http://www.nubiamobileshop.com/blog/nubia-mobile-google-play-installation/