Securely erasing pinephone

[Byte]

Hi all,

I am looking to sell my pinephone and want to securely erase it first, what is the best way of doing this?

I am thinking:

• Boot from another distro on an SD card
  
• Run shred on all partitions on the eMMC
  
• Reinstall OS using jump drive image
  

I think this would work fine but I am wondering

• Is there a better way of doing this?
  
• Is it ok to nuke the eMMC like this or is there firmware, bootloaders etc. on the eMMC that would brick the phone if removed?
  

Cheers