All mobile phones have some configuration options that can be accessed simply by dialing, as if we were calling on the phone. These codes are used by the factory technicians of each brand to carry out tests and actions that can be very useful when we have some kind of problem or breakdown in the mobile. They are tools that can be used both to diagnose and to solve a problem at any given time.
As we have commented, these codes are for developers and technicians so you will understand that their use can be dangerous and could even generate greater problems, so if you are not an expert I recommend that you do not use these numbers unless you are in a case of life or death.
To perform these functions, you just have to write the following numbers and symbols on your phone as if you were going to make a simple call. The codes vary according to the brand of each device.
Ah! And if you want to know more codes for mobile phones, check our post about codes for Android.
Codes for Samsung mobiles
| *#06# | See the IMEI |
| *#0523# | Screen settings |
| *#9999# | Software version |
| *#0837# | Software version |
| *#0837# | Hardware version |
| *#1234# | Hardware version |
| *#2222# | Hardware version |
| *#0228# | Battery information (capacity, voltage, temperature) |
| *#0324# | Advanced technical menu (Without SIM card) |
| *#197328640# | |
| *#9125# | Activate Smiley when charging |
| *#0636# | Memory status |
| *#0377# – *#0246# | Memory information |
| *#0746# | SIM card size |
| *#0778# | More information about the SIM card |
| *#0324# | Network monitor |
| *#0523# | Adjust the contrast of the LCD screen |
| *#0842# | Vibration test |
| *#0636# | Shows storage capacity |
Codes for Iphone
| * 21 # + Call | It shows the configuration and status of the Call Forwarding service, whether for voice, data, fax, SMS, etc. |
| * 30 # + Call | Displays the settings and presentation status of the call appearance. |
| * 76 # + Call | Displays the configuration and presentation status of the connected line. |
| * 43 # + Call | It shows the configuration and status of the Call Waiting service for voice, data, fax, SMS, etc. |
| * 61 # + Call | Shows the number of unanswered calls, if the service is activated. |
| * 62 # + Call | Shows the number of forwarded calls, if the service is activated. |
| * 67 # + Call | Shows the number of forwarded calls, if the phone has been busy. |
| * 777 # + Call Verizon * 225 # Cubacel * 222 # | Remaining credit (Prepaid Services) |
| * 225 # + Call | Remaining Credit (Postpaid Services) |
| * 646 # + Call | Minutes remaining (Postpaid services) |
| * 936 # + Call AT&T * 639 # + Call | Returns text message with information if eligible for a new device. |
| * 3001 # 12345 # * + Call | Displays the Field Test screen with technical information about the signal the phone is receiving. Various parameters appear that indicate the cell, communication towers, distance, etc. It is also possible to use this option to show instead of bars the strength of the signal expressed in numbers. |
Codes for Samsung Galaxy S4 mobiles
| *#0*# | Testmodus |
| *#03# | nandflashheaderread |
| *#0011# | Service menu |
| *#0283# | Loopback test |
| *#0808# | USB Service |
| *#1111# | Servicemode |
| *#7284# | FactoryKeystring |
| *#9090# | Service mode |
| *#12580*369# | Software and hardware information |
| *#34971539# | Camera firmware standard |
Codes for HTC mobiles
| *#*#3424#*#* | Test features |
| *#*#4636#*#* | Displays the information menu |
| *#*#8255#*#* | Monitor Google Talk services |
| ##3424# | Activate diagnostic mode |
| ##3282# | Displays the EPST menu |
| ##8626337# | Displays the VOCODER menu |
| ##33284# | Field Test (field test to monitor the received signal) |
| ##786# | Device information menu |
| ##7738# | Shows the protocols used on the device |
Nokia mobile codes
| *#92702689# | It allows access to the services menu (WarOanty). It shows the date of manufacture, the last technical service, the date of purchase and in some models, send the configuration from one terminal to another via infrared. |
| *#3370* | Enable / Disable EFR. By activating this mode, the quality of the reception signal is noticeably improved, although for this it reduces the battery life by up to 5%. It is only advisable to activate this option when we are in places with little coverage. |
| *#4270* | Activate / Deactivate HRC. Contrary to the previous one, this mode reduces the quality of the signal, but increases the battery life up to 30%. |
| *#0000# | Displays the version of the software. |
| *#7780# | Reset to factory programming. |
Source: norfipc.com
