MEGAphone Module Building Progress: Cellular modem and DC:DC modules

Goran has been working on refining the MEGAphone modules I designed earlier in the year. So let's check in on the status of those. Goran has improved the structure of the castellated pads, so that they can be fabricated more cheaply, without needing to pay the premium for castellation. A part of this is adding "backup holes" behind the castellations 2.4 Cellular Modem, including SIM card Module…