手机安卓系统内嵌了很多测试代码，分享一下。鸿蒙脱胎于安卓，绝大多数通用。

Testing Menu
##4636##

Display Info about device
##4636##

Factory Restore
##7780##

Camera Information
##34971539##

Completely Wipe device, install stock firmware
2767*3855#

Backup all media files
*##273283*255*663282*##

Wireless LAN Test
##232339## OR ##526##

Change Power button behavior
##7594##

Quick GPS Test
##1472365##

Test mode for service activity
##197328640##

Wi-Fi Mac Address
##232338##

Another GPS test
##1575##

Packet Loopback Test
##0283##

Audio Test
##0673## OR ##0289##

Vibration and Backlight test
##0842##

Check touch screen version
##2663##

LCD test
##0*##

Touch Screen test
##2664##

Proximity sensor test
##0588##

RAM version
##3264##

Bluetooth test
##232331##

Field Test
##7262626##

Check Bluetooth device address
##232337##


PDA, Hardware, Phone and RF Call Date info
##4986*2650468##

PDA and Phone firmware check
##1234##

FTA hardware version
##2222##

FTA software version
*##1111##

Displays IMEI number
#06#

Enables voice dialing logging mode
*##8351##

Disables voice dialing logging mode
##8350##

Brings up Epst menu
##778 +call

Displays Build time and change list number
##44336##

Remove Google account setting
##7780##

Reinstall the firmware
2767*3855#

Used to enter into Service mode
*##197328640##

Battery Status
#0228#

Data create menu
*#273283*255*3282#

Data usage status
#3282*727336#

OTA update menu
#8736364#

RF band selection
*#2263#

Diagnostic configuration
*#9090#

USB 12C mode control
*#7284#

USB logging control
*#872564#

Debug dump menu
*#746#

System dump mode
*#9900#

Shows Build time change list number
*##44336##

NAND flash serial number
#03#

Real time clock test
*#0782#

Light sensor test
*#0589#

Quick test menu
*#7353#

Execute from Emergency dial screen to unlock
PUK code
05#