Before you go:

Before choosing a task please ensure no one is currently working on it. When you decide to take on a task, open a GitHub issue and set its title to the same as the task name.
Do not make changes to areas of the project that aren't related to your task.
Stars represent estimated difficulty/complexity.
Tasks are divided into categories: Schematic, Parts, Layout.

Tasks

Schematic

★★★ Connect EC25 GSM/GPS chip
★★★ Connect 3.5 mm jack, codec, mic, speakers.
★★★ Connect components in the power section
★★ Connect fingerprint scanner connector
★★ Swap USB C 2.0 → USB 3.2 and add TVS

Parts

Note parts must be: available from Digikey, compatible with the rest of the system, RoHS compliant (most are)

★ Choose 90 deg piano switches and put them next to the sound switches on the left
★ Choose new battery and add 3D model in place of the previous one
★ Add 3D model of fingerprint scanner and place it under the camera bay

PCB Layout

Empty for now