Plask Mobile aims to provide sustainable mobile services. It currently offers one main service but is considering expanding its portfolio. To be sustainable, Plask Mobile's strategies must consider target markets, market sizes, volatility risks, and goals around either maintaining its core service or pursuing synergies through diversification. Maintaining a clear focus on one service allows Plask Mobile to be the best player, while a portfolio approach could provide strategic advantages through synergies if risks are properly managed.