Specilized SIM card in case of misuse in mobile phones after decrypt. Support lock between SIM card and phone, lock cell and password protection. Random PIN code protection. Phone book storing up to 200 phone numbers. The phone has phone incoming or dialing call bar and fixed dialing functions. You can select the volume and type of ring tone. Off/on hook, handsfree and redial functions. 128*64 LCD with four lines. It can show calls, date and time. Support remote network management. Long distance call locking. Support carrier locking. Automatically add IP access number ahead of long distance calls. GSM900/DCS1800MHz dual mode adaptation. Intelligent power management. Detecting the batteries to recharge or discharge automatically. Friendly interface, detailed menu, graphic and text display. Also you can change the language as you need. Displaying battery level and signal strength. Calls records. Short messages. Call forwarding and incoming caller ID. Setting date, alarm and calculator. You can set key tones, warn tone, message alert and any key answer functions. Quickly responds after pressing the keys. Internal or external antenna. Appearance in good taste. Convenient operations. Using industrial wireless module. 850/1900mHZ frequency optional.