1. IMEI Number : *#06#
This is another important code you can use to make sure your device’s IMEI matches what is shown on the box. Most modern smartphones have their IMEI printed on the back, but if you want to check it, you can do so with this code.
2.RAM Memory version: *#*#3264#*#*
To check the complete ram information of the mobile we can use this code for checking, and also check the usage of the ram of each application usage of the ram, by this we can kill unnecessary applications to increase the ram and make the mobile faster.
3. To test other GPS: *#*#1575#*#* or *#*#1472365#*#*
Check the signal strength how much signal is available and the status of the mobile receiving the signal from the operator. This code helps to identify the signal strength of mobile and bandwidth and dp (means doping signal).
4. Touchscreen version: *#*#2663#*#*
To check the hardware version of the mobile which hardware of the touch version and its screen specifications are used as details of the material quality levels. The most touch screen provides the normal with high fluid glass, but the iPhone and other high-range mobiles use the retina display to clear pixel.
5. Test Bluetooth: *#*#232331#*#*
By this code, we can check in real-time whether the Bluetooth of the smartphone is working are not, by testing all possibilities test by using this code and point out an exact problem where it fails while connecting the other devices like earphones, speakers,& mobile devices and systems through Bluetooth.
6. Display Bluetooth Physic Address: #*#232337#*#
This code uses the display of the physical code of the Bluetooth device of the mobile and also helps to identify if the Bluetooth device is available are not on the mobile.
7. Test WiFi/Wireless LAN of phone: *#*#232339#*#* or *#*#528#*#* or *#*#526#*#*
This code uses to test the wifi speed and the signal strength of the mobile and it also helps lan mobile which comes with the latest version that supports wifi like the jio, airtel, and bsnl wifi lan phones which are running with android. By this, we check the signal wavelength on the wifi and the strength of receiving.
8. Display Wi-Fi MAC Adress:*#*#232338#*#*
To get the wifi mac address we can use the above code, Mac address is the unique code of every device that cant change with every hardware device there will be a separate code of the mac address, so some companies use the binding mac address to the network.
9. To test the Vibration and Back-light of the device: *#*#0842#*#*
Checking new mobile or old smartphone whether the vibration and the black light are working or not by using the above code we can check the vibration & the black light is working are not and either its is disable some old device it will be disabled due to the firmware issues.
10. Audio Test: *#*#0289#*#* or *#*#0673#*#*
The above codes use whether speakers are working or not and sound DB levels how much DB levels are mobile is producing when the test is happening and itis most useful code check the exact code the test quality of the sound.
11. Launch Service Mode: *#*#197328640#*#*
Service mode helps to enter the developer mode all the access is given to the user like the root but not root operations which are used to manipulate the device, this mode uses only checking purposes only but not changing any operations of mobile.
12. Test Proximity/Distance Sensor: *#*#0588#*#*
Sensors mainly use identify the action performed by the objects, these play the main role in the mobile. To test this sensor we use the above code proximity sensors mainly used the check the directions of the poles like a compass.
13. Field Test: *#*#7262626#*#*
This field test is using the complete configuration of all hardware tests to the mobile which we can find any issues in the mobile hardware. These tests mostly uses in the old mobiles and used mobiles to check the device’s health.
14. Format the phone: *2767*3855#
To format a smart mobile or old version mobiles or Symbian mobiles also use these codes to format the devices. To erase the complete data of the mobile we use this type of code to format the android smart mobiles.
15. Restore Factory Settings: *#*#7780#*#*
Corruption or virus attacks on mobile like slow performance and hanging issues mostly technicians use to restore your mobile by this code. we can gain in dial pad to restore the mobile after entering the code just accept the restore option show to restore press Yes.
16. Display Phone information:*#*4636#*#*
Get the complete information of the mobile like all GPS to sensors all hardware components and the mac address of the mobile, this method easy to identify the complete information of the mobile.
17. Detailed Camera Information: *#*#34971539#*#*
Check the complete information of the camera how many cameras and how capacity like its megapixel and focus range of the camera and what company of lens uses and device mac address of each camera is in the mobile and its specification.
18. Software & Hardware Information :*#12580*369#
To get the complete information of the android device from what os(operating system ) it uses and hardware information like the device mac address and the components which are used in the mobile (listed).
20. LCD Display Test: *#*#0*#*#*
Check the pixes by light to test if we use the above code, if any errors occur we can identify them by displaying the dots where the display is not working.
21. USB Logging Control: *#872564#
To get the logs from the device the USB we use the following code to get the logs from the mobile and we can also block them by creating anti-spyware on mobile to stop these types of attacks on the mobile device.
22. System Dump Mode: *#9900#
Check the above codes using the creative bunch of logs and we can dump particular places according to the user’s decision, these are the simple codes we never use.