A: GSM IMEI DTMF dialing/SMS remote changeable, NO NEED PC or

NOT software based; (PC based IMEI changer not stable and very

dangerous, the software is recognized as virus in Microsoft OS in

the recent virus killer software, when IMEI changer processed, the

OS will interfere the software and make the GSM engine lost data

then damage it);

B: IMEI rotation changer based on preset duration;

C: GSM/PSTN auto routing for PBX GSM addon application;

D: SIM call total minutes preconfiged with timeout indication

for special SIM rate plan application;