1. Support all frequencies of GSM or CDMA networks. 2. Inbuilt billing meter, can check the year, the month, and the date's sum; 3. Incoming call number display. 4. Pre-setting the local area code, IP number, Special service number and any other head numbers. 5. Privilege setting for international, domestic, and local calls etc. 6. Function of locking the card, keyboard, telephone unit, network and district. 7. Large LCD display of the operator information, signal strength, battery status, time and date. 8. Big memory of phone book to store the incoming and outgoing calls; 9. Supporting PC fax (optional); 10. Internet connection/SMS function/Payment management function (optional).