The C1 modem is noted for its power efficiency, despite not achieving high speed records compared to newer Qualcomm models like the x80 and x85. User comments reveal skepticism regarding comparative tests, suggesting that the C1's performance needs to be evaluated against these more modern modems for a fair assessment. Further, users comment on Apple's historical choices in modem implementation, often using older technology to optimize performance relative to network constraints. In situations of low signal, the C1 exhibits lower power consumption, suggesting a focus on efficiency in data throughput rather than sheer speed. There are inquiries about how the C1 performs in congested environments, and whether it adheres to standard communication protocols or employs custom ones. Users anticipate the potential for these modems to expand into other Apple products such as MacBooks.