Even the old push-button telephone has a hidden menu, access to which requires a special code combination of keys. Some of them work on all mobile phones, but most are suitable only for models of some manufacturers or working on a separate operating system. Consider 15 codes that can come in handy.
Request IMEI number
Each phone has its own personal identifier (IMEI), which is never repeated. You can see IMEI on the phone screen by typing a key combination *#06#. It will work in absolutely any phone, even on the old push-button. IMEI is used by law enforcement agencies when tracing a stolen phone, so if you have such a nuisance, you will need to provide it.
Hiding your number on an outgoing call on iPhone
Apple smartphones provide code *#30#, after the introduction of which subscribers will not be able to see the caller's number from this phone. This function is disabled by re-seeing the same combination.
Calling up the statistics menu for a phone on Android
If you type a key combination on a smartphone *#*#4636#*#*, then a hidden menu will open in which you can view the statistical information of the phone, such as the temperature of the battery, its voltage and other data.
Call barring on iPhone
IPhone users can dial a combination on their phone *33*#to bar calls without having to disconnect your mobile. To cancel the function, press # 33 * PIN #.
Factory reset on Android
If mistakes were made when adjusting the phone for yourself, after which the smartphone began to work incorrectly, you can return the factory settings with a combination *#*#7780#*#*. After entering it, all settings and accounts will be erased.
Full reset with data cleansing on Android
Keyboard shortcut *2767*3855# permanently erases absolutely everything from the phone. This can be useful if you want to sell or give away your smartphone when you do not want another person to find confidential information of the old owner in the device.
Improving the quality of communication on the iPhone
By entering a combination *3370# you can transfer your smartphone to EFR encoding mode, which implies a better capture of communication. It will be useful if you need to call in an area with poor coverage. The disadvantage of this encoding is faster battery consumption. After the call, you can turn off the mode with a combination #3370#.
Access Android Phone Recordings
If you enter a key combination *#*#8351#*#* on many smartphones running the Android operating system, you can run a mode that allows you to listen to the last 20 of your own phone calls.
Find service center numbers on iPhone
If you want to contact the service center of the mobile operator, you can dial the code *#5005*7672# and its number will appear on the screen.
Disabling Android Smartphone
If the power button is broken, you can turn off the smartphone with a combination *#*#7595#*#*. Unfortunately, to turn it back on you still need a button.
Expanding Call Waiting Functionality on Iphone
Typing a combination on the phone *43# and pressing the call key, you can see incoming calls even if there is already one conversation and the second line is on hold. The function allows you to quickly switch between calls. To return to the old mode of operation you need to dial #43# and a challenge.
Access the service menu in Samsung Galaxy
If you dial the code *#0011# on Samsung Galaxy, then you can open the service menu.
Digital display of signal strength on iPhone
A graphic icon indicates the strength of the received communication signal. To get a real numerical expression of the signal, you can enter a combination *3001#12345#*, then hold down the Power button until the power slider appears and click the Home button. A digital expression of the signal appears on the screen. The -140 DMB indicator is the lowest signal level, and -40 DMB is the highest. To exit this mode, you must re-enter the code and press Home.
Sending all incoming voicemail calls to iPhone
The code *#21# Transfer all incoming calls to voicemail. Forwarding is disabled by re-entering the same combination.
Hiding a number on an outgoing call
Typing a combination # 31 # + phone number You can hide your number when calling. The code works on iOS and Android.
Unfortunately, few fully universal codes work on absolutely any phone. Nevertheless, the list will surely contain several effective and useful combinations for each device.
