OpenSignal, the crowdsourced data application for wireless performance and coverage, has raised $8M in Series B funding from investors that include Qualcomm Ventures, Octopus Ventures, Oreilly AlphaTech Ventures, and Passion Capital. Founded by Brendan Gill, James Robinson, Sam Westwood, and Sina Khanifar in 2010, the company has now raised a total of $13.3M over three rounds.