Android application to mimic a physical RFID card

Question

Is it possible for an Android application to send a previously stored RFID card ID to a NFC reader? The aim would be to use an Android device to enable access to a room instead

Answer 1

The android view:

Long story short: It's not possible.

Long story long:

It would be possible from a hardware and software point of view to do this. The NFC chips are perfectly capable to emulate most (not all) standard tags. The functionality to do this is even built in the lower level software but not exposed to applications.

Why: Emulating tags is what the entire mobile payment infrastructure is built upon. Allowing two card emulations of the same type at once is for most NFC chips not possible and will also shut off mobile payment as mobile payment readers only accept a single tag at once (for security reasons).

Things are a bit different for RIM based Blackberry phones, they allow card emulations (even have this feature out of the box) but they don't do any mobile payment at the moment as far as I know.