Features: 1) Two number in one card 2) Exclusive origination of holding the original card STK function. This function also can make the dual SIM card become multi SIM cards for use 3) Two number auto switch on line. The auto switch time of two numbers can be set separately a) SIM 1 1 minute to 99 minutes b) SIM 2 1 minute to 99 minutes 4) Initiate show number on screen function 5) Language (Chinese / English / Pyccknn / Turkce). Customer OEM local language available in a large order 6) Freely switch number on line Without power on/off 7) The record of calling memory function 8) Support V1 and V2 card (designed for Multi card) 9) The most highly applicability of the mobile 10) Use the import America IC 11) Quality control by Japan standard 12) Meticulous design Taiwan 13) Taiwan patent number M275641