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I am working with Android phones that have 2 SIM card slots. I want to know if there is a way to use one of these slots to read another type of card, like JavaCards?
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Smartphones and tabletsThe Go Smart App for Android can read physical and virtual smartcards. To read a physical smartcard, your device will need to be Android 6.0 or later with Near Field Communications (NFC). NFC options are generally found in 'settings' on most devices.
Mobile Sim Card ReaderThe GSM SIM reader allows you to read, backup and modify information you may carry in your SIM card. It allows you to store, read and edit phonebook data and SMS messages.
A: The USB card reader works ONLY for MicroSD memory cards; it will not read sim cards.
What is this? Some phone models are of the Dual-SIM variety, meaning that you can use two different SIM cards and connect to two different phone networks, and have two different phone numbers on the same device. But you can't use a SIM card or a micro-SIM card in an SD card or Micro-SD card slot or vice-versa.
If your phone implements SEEK for Android open source stack, try enumerating the readers (you could have SIM1, SIM2). If you see 2 SIM readers, you're good to go. Honestly I think this is unlikely though, because Android's RIL interface is not designed to work with 2 SIMs.
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