Power button: long press the button to boot
Volume button: adjust the volume
Charger interface: connect device charger
USB interface: connect the device USB cable to communicate with the computer
Scan head: put a one-dimensional QR code into the scan head area for scanning
Cellular signal Shows the signal strength of your phone. The more the number of cells, the stronger.
Flight mode Show flight mode is on, you cannot use the phone
No access to the carrier network but with a signal, only emergency calls can be made
Wireless network Shows that you are connected to a wireless network
Mute Shows that you are currently muted
Memory card detection error Shows that there is no SD card inserted in your phone or the card failed.
GPS location service Shows that an application is using location services
Alarm clock, you have set an alarm
Bluetooth shows that you have Bluetooth turned on