fastboot oem off-mode-charge 0 is the genuine method to automatically power on Android when the charger is connected. To be clear, it skips the screen where a charging battery is displayed. Not all OEMs/vendors implement the command in bootloader. Or on some devices it's reset on next reboot. If off-mode-charge is disabled, bootloader won't pass androidboot.mode=charger commandline parameter to kernel when charger is inserted, so device boots normally.

I have tested this command on a few devices and so far only the Nexus 4 device allows it. I need to buy a couple of devices where this command is working.

I you have tried on your device and it works, please give me your exact model.

  • This looks like an answer to the dupe, so I'm not sure what is the question here (or did you intend to post the answer there?). If the question is to list which devices this command work, please clarify that (although it could be off-topic as "hardware recommendation") – Andrew T. Apr 12 at 12:57
  • First paragraph is copied from my answer to the dupe. You can simply give reference to a similar question you have already gone through and then explain what it doesn't answer and how your question is different. Btw asking for external resources is off-topic here. – Irfan Latif Apr 12 at 15:27
  • i don't think the year does matter – alecxs Apr 13 at 8:30
  • Well I need to buy a device today. The answer from 5 years ago doesn't work on modern devices. Thank you for nothing. – Pascal Ganaye Apr 16 at 18:35