Like any otherz phone brands,Chinese Phone Brand also has many codes to access some secret menus,letz check it!
1122,3344,1234,5678 =default user code
*#110*01# = Technicial mode
*#987# = Factory mode
*#110*01#,device,set UART,PS,Config.,UART1/115200 = C0M Port activation
*#987*99# = Restore fact. Settings
*#369# = Set LCD contrast
*#800# n *#900# = software verz.
*#0000# send = set standard language
*#0044# send = set english lang.
*#001# send = set english lang. (new firmware)
*#0086#,*#0886# = set lang. to Mandarin
*#0084#,*#0966# = set to Vietnam lang.
1122,3344,1234,5678 =default user code
*#110*01# = Technicial mode
*#987# = Factory mode
*#110*01#,device,set UART,PS,Config.,UART1/115200 = C0M Port activation
*#987*99# = Restore fact. Settings
*#369# = Set LCD contrast
*#800# n *#900# = software verz.
*#0000# send = set standard language
*#0044# send = set english lang.
*#001# send = set english lang. (new firmware)
*#0086#,*#0886# = set lang. to Mandarin
*#0084#,*#0966# = set to Vietnam lang.