Notes on installing custom rom

ADB platformtools & twrp

Div commands:

.\adb devices

.\fastboot flash recovery twrp.img

.\adb sideload file.zip (only if u have to factory reset and wipe everything but normally not needed.

https://twrp.me/faq/whattowipe.html says:

If you are switching ROMs (changing from one ROM to a completely different one) then you should perform a factory reset. A factory reset wipes data and cache (which includes dalvik cache). A factory reset will also wipe sd-ext and android_secure if your device has those items. 99% of the time, this is all that you need to wipe and you only need to do it once, not three times as some people would lead you to believe.

If you're installing a nightly update, then oftentimes you don't need to wipe anything at all. However, if you encounter strange behavior, then you may want to consider performing a factory reset. Of course, if the ROM maker recommends that you do a factory reset during an update, then it's a good idea to follow their recommendation.

The vast majority of ROMs wipe system as part of the zip install. This means that in most cases you do not need to wipe system... ever.

--------------
Copy the custom_rom_whatever.zip file to the phone
In twrp - choose wipe - just default - then back and tap install - find the .zip and wuhey.