Have you ever stumbled upon a cryptic code while scrolling through online forums or tech blogs? One code that has piqued the curiosity of many Android users is #21#. This enigmatic sequence of characters has sparked a flurry of questions: What does it do? Is it harmless or potentially harmful? Should I try it out on my phone? In this article, we’ll delve into the world of Android secret codes and uncover the mystery behind #21#.
What are Android Secret Codes?
Before diving into the specifics of *#21#, let’s take a step back and explore the realm of Android secret codes. These codes, also known as USSD (Unstructured Supplementary Service Data) codes, are hidden commands that can be used to access various features, settings, or information on your Android device. They typically consist of a combination of numbers, symbols, and special characters, making them look like a complex password.
Android secret codes can be used to perform a wide range of tasks, such as:
- Checking your phone’s IMEI number
- Viewing hidden menus and settings
- Enabling or disabling specific features
- Running diagnostic tests
- Accessing device information
These codes are often manufacturer-specific, meaning that what works on one brand of Android phone might not work on another. However, some codes, like *#21#, are more universal and can be used across multiple devices.
What Happens When You Dial *#21# on Your Android?
Now, let’s get to the main event! When you dial *#21# on your Android phone, you might expect something remarkable to happen, like unlocking a hidden feature or revealing a secret message. But, in reality, the outcome is a bit more…underwhelming.
dialing sound effects
When you enter *#21# and press the call button, your phone will display a pop-up message stating that the “Service Query Failed” or “Connection Problem or Invalid MMI Code.” This is usually followed by a generic error message, which might vary depending on your device and carrier.
So, what’s going on here? Why doesn’t #21# seem to do anything significant? Well, the truth is that #21# is not a functional code. It’s not a secret unlock or a magic trick; it’s simply a non-existent code that doesn’t correspond to any specific feature or setting on your Android device.
The Origins of *#21#: Debunking the Myths
The origins of #21# are shrouded in mystery, and it’s difficult to pinpoint exactly where this code came from. Some online forums and blogs claim that #21# is a secret code that allows you to access hidden phone features, such as advanced call forwarding options or network configuration settings. However, these claims are largely unfounded and based on speculation.
Other theories suggest that #21# might be related to call forwarding or call blocking features, but there’s no concrete evidence to support these claims. In reality, #21# is likely a code that was never intended for public use or was mistakenly documented online.
Potential Risks and Concerns
While dialing *#21# might not seem to do anything, it’s essential to address some potential concerns and risks associated with experimenting with secret codes.
- Accidental premium services activation: In some cases, dialing certain USSD codes can inadvertently activate premium services or subscriptions, leading to unexpected charges on your phone bill. Be cautious when experimenting with secret codes, as you might stumble upon a code that incurs additional fees.
- Device security: Using unknown or undocumented codes could, in theory, compromise your device’s security. Malicious actors might exploit vulnerabilities or use crafted USSD codes to gain unauthorized access to your phone or sensitive information.
- Phone damage or bricking: There’s a remote possibility that certain secret codes could cause harm to your device’s software or hardware. While this is extremely unlikely, it’s crucial to exercise caution when exploring the world of Android secret codes.
To minimize potential risks, always:
- Research thoroughly before trying out a new code
- Use reputable sources and official documentation
- Be cautious of codes that seem suspicious or unverified
- Avoid using codes that could potentially incur additional fees or compromise your device’s security
Other Android Secret Codes You Should Know
While *#21# might not be the most exciting code, there are many other Android secret codes that can be genuinely useful. Here are a few examples:
- *#06#: Displays your phone’s IMEI number, which can be helpful for tracking your device or troubleshooting issues.
- ##4636##: Opens a hidden menu for testing and debugging purposes, allowing you to view detailed device information and run diagnostic tests.
- ##7780##: Resets your phone’s settings to their factory default values, which can be useful for troubleshooting or preparing your device for sale.
Remember to use these codes responsibly and only when necessary.
Conclusion
The mysterious *#21# code might not be the revelation you were hoping for, but it does serve as a reminder to approach online information with a critical eye. Android secret codes can be fascinating, but it’s essential to separate fact from fiction and exercise caution when exploring the unknown.
By understanding the world of USSD codes and being mindful of potential risks, you can unlock the full potential of your Android device and stay safe in the process. So, go ahead and explore the realm of Android secret codes, but always remember to proceed with caution and respect for your device’s security.
| Code | Description |
|---|---|
| *#06# | Displays phone’s IMEI number |
| *#*#4636#*#* | Opens hidden menu for testing and debugging |
| *#*#7780#*#* | Resets phone’s settings to factory default values |
What is the *#21 code and what does it do?
The *#21 code is a special sequence of characters that can be dialed on an Android device to access a hidden menu. This menu provides information about the device’s call forwarding settings, which allow you to redirect incoming calls to another phone number or voicemail. The code is not specific to any particular carrier or device, and it can be used on most Android phones.
The code is often referred to as a “secret code” because it is not widely known and is not typically listed in the device’s user manual. However, it is a legitimate feature of the Android operating system and can be used to troubleshoot call forwarding issues or to simply explore the capabilities of your device.
How do I dial the *#21 code on my Android device?
To dial the #21 code, simply open the Phone app on your Android device and enter the following sequence of characters: #21#. You can do this using the keypad or by using the dialer app. Make sure to enter the code exactly as shown, including the asterisk symbol (*) and the number sign (#).
Once you enter the code, you will be taken to a hidden menu that displays information about your call forwarding settings. From this menu, you can view or modify your call forwarding settings, including the phone number that incoming calls are forwarded to and the conditions under which calls are forwarded.
What information does the *#21 code menu provide?
The *#21 code menu provides information about the call forwarding settings on your Android device. This includes the phone number that incoming calls are forwarded to, as well as the conditions under which calls are forwarded. For example, you may have set up call forwarding to send calls to your voicemail when your phone is busy or unreachable.
The menu also provides options for modifying your call forwarding settings, such as changing the phone number that calls are forwarded to or turning call forwarding on or off. You can also use this menu to troubleshoot issues with call forwarding, such as determining why calls are not being forwarded correctly.
Can I use the *#21 code on any Android device?
The #21 code is a standard feature of the Android operating system, and it can be used on most Android devices. However, it’s possible that some devices or carriers may have modified or disabled this feature. If you try to dial the #21 code and it doesn’t work, it may be because your carrier or device manufacturer has disabled it.
If you’re having trouble getting the *#21 code to work on your device, you can try contacting your carrier or device manufacturer for assistance. They may be able to provide additional information or help you troubleshoot the issue.
Is the *#21 code safe to use?
The *#21 code is a legitimate feature of the Android operating system, and it is safe to use. However, as with any sensitive information about your device, you should be cautious about who has access to this menu and the information it provides. You should also be careful about modifying your call forwarding settings, as this can affect how your phone handles incoming calls.
In general, it’s a good idea to be cautious when using any hidden menus or codes on your device, as they can provide access to sensitive information or allow you to make changes to your device’s settings. Always use these features responsibly and with caution.
Can I use the *#21 code to forward calls to another number?
Yes, the *#21 code menu provides options for modifying your call forwarding settings, including setting up call forwarding to another phone number. This can be useful if you want to redirect incoming calls to a different phone or to a voicemail service.
To forward calls to another number, simply use the *#21 code menu to access your call forwarding settings, then select the option to forward calls to a different number. You will be prompted to enter the phone number that you want to forward calls to, and you can then confirm the change.
What other hidden codes are available on Android devices?
There are several other hidden codes and menus available on Android devices, in addition to the *#21 code. These codes can provide access to a range of features and settings, from troubleshooting tools to customization options.
Some examples of other hidden codes and menus on Android devices include the #06# code, which displays your device’s IMEI number, and the ##4636##* code, which provides access to a range of testing and debugging tools. You can find more information about these codes online or through experimentation with your device.