I also have my AT&T SIM and Mint Mobile SIM set to “Ask Every Time” on which to use for data and calls in both the Settings app of AlienDalvik and Settings in SailfishOS. I’m now running SailfishOS 4.1 Kvarken… I also have the Mint Mobile SIM in the second SIM Slot, and the AT&T one in the first SIM slot.