In this paper, we study an important issue whether the network properties on mobile social networks are still similar to these on traditional web-based social networks. To explore such answers is important since the paradigm shift has already happened from PC-based access to mobile access nowadays. In this paper, we focus on Instagram, which is a remarkable mobile-based photo sharing platform, as the reference network. We comprehensively study its network properties in the quantitative sense, and reveal some interesting results. Surprisingly, some properties in Instagram are highly diverse from these characteristics in traditional social networks such as Facebook and Twitter. We thus state that traditional assumptions on the network properties should be re-verified when developers devise social applications, such as the advertisement strategies, for mobile networks. We also conclude that the new research spectrum is highly demanded on network analysis and social technologies for the next-generation mobile-based social platform.