28

As the How has already been explained, you might want to have the What as well: There are several lists on the internet (just google for "secret codes") with many of those codes. Not all of them work on all phones (some are device or manufacturer specific), but many are common to all Android devices (and some times even to all smartphones). I won't list all ...


16

Here are the standard vanilla codes that should work across all devices: A quick grep through the source code revealed these secret dial codes (for Android 4.1): 4636 (show debug info in apps/Settings) 8351, 8350 (start/stop voice call debug logging or so in apps/VoiceDialer) 36245 (debug email in apps/Email) 8477 (? in apps/Protips) 225 (debug ...


12

TL;DR Application processor (AP) = CPU + GPU Cellular processor (CP) = Cellular modem The long version: CP stands for Cellular Processor. It's also referred to as Baseband Modem. Another reference is Baseband Processor, or BP for short. AP stands for Application Processor. These are 2 of the 3 fundamental building blocks in mobile devices. The third being ...


8

Go to your phone dialer and enter these codes (they work in my Samsung Galaxy Nexus, Jelly Bean 4.2.1): 'Testing' menu: *#*#4636#*#* (the same as *#*#INFO#*#*) IMEI number: *#06# Additionaly check out the page Secret codes for Android, full of codes (some of them didn't work in my phone) and screenshots Note: Please be extremely careful with the ...


5

Well, there is a menu available for handsets running android OS. To get the menu, go to your stock phone app and type the following. **#*#7378423#*#* It is simply *#*#SERVICE#*#* There are many things you can do in this menu. View service information Check service settings Carryout service tests Reset customization settings Some of these items may ...


5

There is an app on Google Play that will inspect the AndroidManifest.xml files of all the apps installed on your phone for secret code broadcast receivers, and then list the codes associated with them. The app is called Secret Codes Revealer and you can download it from Google Play. (Note: If you get a blank entry in the list, it is because the app hasn't ...


5

The bad news is that some phones (like yours) don't support setting your own phone number. The good news is that this information is not stored on your phone but on your sim card. So if you put your sim in another device and set your number there than you can put it back to your phone and voila, your number will show. Some devices that support setting your ...


5

There's an app called Auto Redial that you can configure to keep calling the same number over and over. I configured it like this: (click screenshot to enlarge) Note that I added ,1,1 after the number. This makes the phone automatically dial 1 twice, once the call is connected. This works even outside of the app, while dialing a number manually or from ...


4

A lot of the secret codes are either carrier specific or ROM specific. An example, I bought my son an HTC EVO 4G (from swappa) and called sprint to activate it. They had me enter one of the secret codes and it should have launched a window that would ask for a PIN. But it did not. The reason was because the phone that I bought was running CM7. In order to ...


4

From adb shell: am broadcast -a android.provider.Telephony.SECRET_CODE -d android_secret_code://<secretcode> Where <secretcode> is the code without the asterisks, e.g., 4636. This is more effective than the DIAL action because it's direct and does not rely on the dialer to parse the code and fire the secret code intent itself. (Some dialers ...


4

This is just showing whether your phone number is saved to the phone number description property on your SIM card. Some networks always program this in for you, many don't. Some phones let you write to this property, some don't, some read it, some don't. It has nothing to do with what actual phone number is attached to that SIM card by the phone company. ...


3

Call the Service Menu : with *#0011# and then hit (menu) Back and then (menu) Key Input and enter Q0000 and wait. Select UMTS -> Debug Screen -> Phone Control -> Network Control -> Band Selection -> Automatic Done. May be restart the phone.


3

Go to Settings → About phone → Status, scroll to bottom and you will be able to see Up time. I think this feature is available on Android 4+.


3

There are at least three ways of doing it. Programmatically by starting an Activity with Intent.ACTION_DIAL: String secretCode = "123456789"; Intent intent = new Intent(Intent.ACTION_DIAL); intent.setData(Uri.parse("tel:*#*#" + secretCode + "#*#*")); startActivity(intent); Programmatically by broadcasting an Intent: String secretCode = "123456789"; ...


3

It's possible that your phone does not support the code. If you look at one of the comments in the askvg link you shared in the comment, one user says: LCD TEST Does not work for Galaxy S2. However, another user replied that it is supported, but with a different code.


2

Unfortunaltely, all Android devices will have a different set of secret codes. Some of them are specific to some devices, some others aren't. Secret Codes are generally defined by the applications installed on the device. If you want to have a valid list of secret codes available on your device, you should use an automated secret codes crawler. Then you ...


2

Here's what I did in my dual sim J1, trial and error...I entered Q and numbers and it didn't bring up DEBUG MODE so I went in Menu > Select> I entered row number 1 and it brought up the Debug mode. So I followed it up to Debug Screen -> Phone Control -> Network Control -> Band Selection. It had for sim slot 1 and 2, I selected sim 1 and it had LTE 1 and 2. ...


2

These dialer codes all vary by OEM in their stock ROM's... the codes for stock firmware are often easily accessible via searching the Internet or via apps available from various sources. However, how custom ROM makers handle these codes, if they implement them at all, is an entirely different thing again. There are some standard-ish codes, like *#06#, but ...


1

Just quit the app and it's ok. If you change some settings (e.g in *#*#4636#*#*, setting priority to "Only GSM" or "WCDMA"), this will be set on your device. But if you only run it without changing the settings, quitting is enough. To get your phone on "running test mode" you have to do it on "fbootloader" screen and set it to "factory mode", but ...


1

No. The system does a check against a list of numbers (provided by system property ril.ecclist/ro.ril.ecclist; by detecting the current country or locale) and if that doesn't match with the available numbers, it doesn't proceed with the dialing and informs the user. Related read: Do all Android phones come with emergency call (power button pressed thrice) ...


1

I tried solutions from the below links GSM Feature Codes GSM Codes but no help. Called Motorola Customer Care n they told me to Factory Reset. I did after backup of my data and now it works.


1

I use Secret Codes. From the site: Secret Codes is an application that allows you to scan the secret codes available on your device through the dialer app. The application will scan through all available secret codes on your device. Then you will be able to executes these secret codes and discover hidden functionalities. In Android a secret code is ...


1

The box of my Asus Zenfone 5 (501CG) says SAR (some chinese characters) 2.0 W/Kg; (some chinese characters again):0.710 W/Kg


1

*#*#7262626#*#* – Perform a field test *#2263# - If previous doesn't work. Sadly, Samsung used to provide field test display by entering codes in keypad. However, from Galaxy S3 onward, the service mode *#*#197328640#*#* was disabled. Only *#0011# is still available. The worst is that even the Android default testing info *#*#4636#*#* was disabled as well. ...


1

You shouldn't trust such a list of secret codes, simply because secret codes are not only device specific but mostly app specific. Secret Codes are generally defined by the applications installed on the device. If you want to have a valid list of secret codes available on your device, you should use an automated secret codes crawler. I recently ...


1

"Dialer Codes" are divided into multiple categories: USSD and supplementary service Codes: network specific, should work on any device ("device independent") manufacturer specific codes: specific to devices of a given manufacturer device-specific codes: as the name says, specific to a given device system-specific codes: specific to a given device ...


1

It seems that the code is specific for Samsung devices. Therefore, if your device is made by another manufacturer, it doesn't work (if the manufacturer hasn't added it specifically).


1

On most Android phones, the code *#*#4636#*#* provides network information such as signal level and preferred networks. However I am unsure of what you mean by displaying that information within the HTC Explorer.


1

Xperia™ Function Tester App I would suggest trying this official application to find out the information you needed.


1

Ok, so I discovered what the issue was... It seems that it only works if the app is a system app - I have no idea why, as it works normally on my mum's phone running Android 2.3.7. It must either be an Android 4.1.3 feature, or a CyanogenMod feature. I will investigate further however. EDIT: This wasn't actually the issue. It turns out it was a ...


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