These modems would often slot into a Mini PCI-e slot in the netbook motherboard ... figuring out which pins are used to talk to the SIM card, and soldering them up to a SIM adapter, or directly ...

Mini PCI is a subset of the PCI interface that uses a significantly smaller card form factor. Supporting only 3.3 volts and 32 bits of the PCI specification, Mini PCI was designed for peripherals ...

The Seaberry is one such design, as demonstrated by [Jeff Geerling], giving the CM4 a Mini ... space for PCI devices wasn’t a problem. Further attempts involved adding in a 12-card carrier ...