1.Work with SIM card 2.Easy to be installed 3.Could store 3 access numbers, and the 3 accesses are optional 4.Could reroute uses call after programming the specified access number 5.Could set prefix go though or by pass the dialer 6.Supports 3 working modes: a.call through before connection establish b.call through wait for connection establish c.call back 7.NO need to change user's conventional dialing habit: a.support dial from the contact and phone book, no need to memorize and input the numbers b.support dial directly from mobile phone's missed calls/call record/call history/recent calls 8.Compatible with many mobile phones,such as Blackberry, Nokia, LG, Motorola, Sony Ericsson, Samsung Support USB programmable function Support SMS function