Damn, it appears that STK does not work anymore in 2.0.2.48. I know there has been issues before, but so far it worked for me just fine. Have to investigate further. I could revert back, but I think it is easier just to switch the sim card to a J1 with previous OS version (I happen to have such a beast).

Does anyone know how to see STK's presence from command line? Logs or anything?