PIC16 + sim cards

[Gusse]

My understanding is that mobile phones use I2C and here is a data sheet

http://www.datasheet4u.com/html/O/M/...ctors.pdf.html

Steve

I2C bus is between SIM controller IC (and levelshifter) and system IC. There is a different interface between controller IC and SIM card.
It might be easier to use these available interface IC's instead of building your own to PIC. IMHO

ISO/IEC 7816-3 defines "Electrical interface and transmission protocols" for smartcards.

BR,
-Gusse-