The first thing you should do before modify Android operating system is to unlock bootloader. We wrote a great user manual how to unlock bootloader on different smartphones: Nexus, Pixel, Samsung, LG, HTC, Xiaomi and others. What is Bootloader? Each Android device has a specific hardware, so there is no common way to unlock bootloader. You should use different methods for every phone model. Attention: modifying the original software of smartphone may put your device at risk and void the warranty. Any modification that you make to the software of your smartphone is under your total … [Read more...] about How to unlock Bootloader on Nexus, Samsung, LG and others