Java Card

Hello everyone,

I just finished my SIM applet, with AES encryption and SMS function.
The sim toolkit I used is ASPECTS Developer.
This program has been test sucessed in my computer.
But what should I do if I want to implement in a real card?

Should I buy a brand new sim card?
But how can I use a brand new sim card sending SMS withous paying any month to system provider?
Or can I use my prepaid sim card, which was bought in phone store and try to install applet into it?

And, actually, when I trying to use card reader( Schlumberger Reflex72 smart card reader) to read the prepaid sim card(gemplus, type unknown), it failed.
But this card reader can used to read the Schlumberger Cryptoflex card.

So, the type of card reader of sim card is different?
Should I buy a new card reader or buy a new empty card?

Can some one give me help or any suggestion?

Thanks in advance.