Mobile sports betting will launch at 10 a.m. Friday and the expansion of gambling onto smartphones in every corner of Massachusetts will come as the newly-legal industry finds itself under investigation by regulators and facing scrutiny from the state attorney general.

The Massachusetts Gaming Commission voted unanimously Thursday afternoon to award certificates of operation to Barstool Sportsbook, BetMGM, Caesars Sportsbook, DraftKings, FanDuel, and WynnBET, allowing those six mobile companies to join the in-person wagering operations that have been running since Jan. 31 at Plainridge Park Casino, MGM Springfield, and Encore Boston Harbor.