T-Mobile LG K7 K330 Stock Firmware Android Lollipop 5.1.1 Updated KDZ File. Here you can Find Tmobile LG K7 Phone Official File And Complete Guide For How to install Stock ROM on LG K330 Device Just Follow Below Content Instructions. LG K7 K330 T-Mobile Phone Specs And Android 5.1.1 Update Operating System: Android 5.1 (Lollipop) Display: