Upgrading a PinePhone Braveheart edition to 3GB

This person's got some really cool posts on their blog. Love the piMate 300: https://deninet.com/creation/2020/12/06/pimate-300

Title was slightly misleading. I was expecting more soldering but…

> Instead of buying a new PinePhone outright, I decided instead to do something I never attempted before:

> Replace a phone's mainboard.