1. Four cards and four standby, no need to switch
2. Retractable and detachable antenna to enhance mobile phone signal
3. Phonebook 500, contacts can be grouped, SMS 200
4. 9 groups of family dial: Contacts-options-others-speed dial
5. The earpiece is very loud, which is very suitable for people with poor hearing or sound requirements, noisy people, etc.
6. Multimedia: DV, video playback, recorder, camera, calendar, alarm clock 3 groups, computer, power bank (long press * to turn on/off), 1 game
7. Common shortcut keys: Long press 0 - turn on power saving mode; long press # - mute mode; social software + MP3 + FM shortcut keys
8. The camera can zoom up to 8 times, and the shooting effect can be set
9. Social software: browser, facebook, opera mini, whatsapp
10. Call blacklist, refuse unnecessary interruptions

Notice:
1. Change the string command: *#35*#, India, Turkey, Colombia, Azerbaijan need to change to the local string code to use
2. Test command: *#3233*# Test command
3. Countries not allowed to leave: Japan, South Korea, Singapore, etc.
4. The 2G network of AT&T in the United States seems to be closed and cannot be used
5. If the card is not read, it may be that the customer does not use a large card, and the small card cannot be read without aligning with the chip when the small card is inserted.
6. Unlock: upper left +*
7. The phone is unlocked