FULL 6.6.1 developer for H60-L12
In a post many peaple experimented to change 2 line of codes to activate 4G on sim2. They succeeded.
edit 3: twrp does not load, fastboot remained on screen
What is the purpose of your command ”fastboot boot twrp.img” ???? Have you read your error? Have you read the fastboot help? Do you what to REboot the device with that command?
simple math: 9v*3a = 27w