... Commands)* SIM application toolkit* Supply voltage range : 3.1 ... 4.8V* Low power consumption: 1.5mA(sleep mode)* Operation temperature: -40 ... support* Coding schemes CS 1, 2, 3, 4* CSD up to 14.4 kbps* USSD* Non transparent mode* PPP-stack Specifications ... – Full rate (FR) Interfaces* Interface to external SIM 3V/ 1.8V* analog audio interface* RTC backup* SPI interface (option)* Serial interface ...