The “device divide” occurs when uses of the Internet vary substantially by device. While the mobile phone was welcomed as a way to reduce the general digital divide, much early research presumed that mobile Internet was essentially inferior to personal-computer-based Internet in terms of possible online activities and related benefits. Given ongoing developments in devices, online activities, and socio-demographic differences, we reassess the device divide. After reviewing the concept, and considering mobile phone capabilities that could influence activities, followed by summarizing changes in device usage and online activities in the United States, we analyze the device divide from 2011 to 2019 in Armenia. Over time, use of mobile Internet separately and combined with personal computer Internet grew, and differences in online activity use withered, raising issues of whither device divide research. Nonetheless, in all years, there are continuing demographic-based digital divides after controlling for device divides.