MEGAphone SIM Card / SD Card Module

In the previous post I designed the cellular modem module. However, the requirements for the device include having a SIM card, which I had elected to put on a separate module, so it's time to make that module now: Requirement 2.2.1: Cellular Module Carrier board that can accept an industry standard industrial cellular modem, breaking out all pins from the connectors, and provides a SIM card slot.…