I am trying to root an old tablet so that I can install a Custom OS like Lineage on it. The tablet in question is a LG G Pad™ 7.0 LTE and the OS is Android 5.0.2 (Lollipop) but I have hard time rooting this device and I really want to put in a Custom Rom in it. Can anyone help me? I was able to get ADB but just cannot root or format it to install the rom.