1) 1 to 6 numbers (different countries and different dealers can share one card by copying) All GSM V1 system card can be copied
2) Invisible Number Function, SIM1 switch to SIM2, while SIM1is invisible. When someone dialed sim 1, System tone noticed "The number you dialed can’t connect at a moment, please dial later"
3) Auto switch online (Two times auto switch, the time is 00: 00).
Sim1—Set time 00: 00
Sim2-- Set time 00: 00
4) IP Dialing Device
Two groupe routes set ( For example: 17909)
Two groups condition set ( For example: 00 )
5) Enlarge Phone Book 250 Groups
6) Enlarge Message 80 Groups