I work with Android phones that have 2 SIM slots. I want to know if there is a way to use one of these slots to read another card, for example, JavaCards?
If your phone implements open source SEEK for Android , try to list the readers (you may have SIM1, SIM2). If you see 2 SIM card readers, you're good to go. Honestly, I think this is unlikely, because the Android RIL interface is not designed to work with 2 SIM cards.