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Are the navigation keys not backlit on this phone?
I just got the ZTE Blade T2 559DL a couple days ago. The navigation/soft keys (home, back, recent apps) never light up.
I have tried changing the brightness settings and covering the light sensor, but no luck.
I also have a ZTE ZFiveG 557 that has a setting to change the length of time these keys stay lit, but this option is not in the Blade T2 Display Settings.