Here is small list of some important mobile codes which is necessary to know about your smartphone. If you have an android mobile phone then you must know all below secret codes for your android mobile phone.
Secret codes smartphones
Secret Codes

※※ HTC MOBILES CODES ※※


1. *#*#0842#*#* – VIBRATION TEST & BACKLIGHT TEST
2.  *#*#0*#*#* – LCD TEST
3. *#*#2664#*#* – TOUCHSCREEN TEST
4. *#*#232337#*# – FOR BLUETOOTH TEST

5. *#*#3264#*#* – RAM VERSION.

6. *#*#3424#*#*   – function test Program. 

7. *#*#4636#*#*   – Info menu 

8. *2767*3855#   – Complete wiping of your android device it also re-installs the Phones firmware(test at own risk)

9.*#*#0*#*#*  – Test Your Phone’s LCD display 

10. *#*#2664#*#*  – Touch-Screen test 

11. *#*#1472365#*#*  – Quickly test your GPS

12. *#06#   – Displays IMEI number 


※※ SAMSUNG PHONES CODES ※※


1.  *#0*# – TEST VIBRATOR, LCD, CAMERA ETC
2.  *#1234#- INFORMATION ABOUT SOFTWARE
3.  *2767*3855# – FORMAT DATA
4.  *#*#34971539#*#* – INFORMATION ABOUT CAMERA
5.  *#*#7594#*#* – DIRECT SWITCH OFF MOBILE.
6. *#*#4636#*#*  – Phone information, Battery and usage details.
7. *#*#34971539#*#*  –total information about camera. 
8. *#*#2664#*#*  – Touch-Screen test 
9. *#*#232339#*#* – Wireless LAN Tests
10. *#*#526#*#*  – Wireless LAN Tests
11. *#*#232338#*#*  – Displays Wi-Fi Mac-address 
12. *#*#8255#*#*  – For Google Talk service monitoring.
13.  *#*#1472365#*#*  – Quickly test your GPS
14. *#*#1575#*#*  – A Different type GPS test
15. *#06#   – Displays IMEI number.


※※ NOKIA PHONES CODES ※※

1.   *#0000# – MODEL NO. , SOFTWARE VERSION & DATE
2.   *#92702689# – TOTAL CALL DURATION
3.  *#7780#   – DATA RESET/FORMAT
4.   *#7370# – FORMAT MULTIMEDIA PHONES
5.   *#2820# (*#bta_#) – BLUETOOTH TEST
6. *#*#0283#*#* – Packet Loopback test List
7. *#*#1472365#*#*  – Quickly test your GPS
8.  *#06#   – Displays IMEI number.

Note: All codes is tested by HowToCrazy Team

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