What are the secret phone codes?

Secret phone codes, often called USSD codes, unlock hidden menus for diagnostics, network info, and call settings on Android and iPhone, like *#06# for your IMEI, *#*#4636#*#* for phone info (Android), *3001#12345#* for Field Test (iPhone), or *67 before a number to hide your caller ID. Codes vary by phone manufacturer and carrier, but many universal ones reveal hardware tests, battery status, and call forwarding details.


What does *# 7353 do?

*#7353#: This code opens the Quick test menu. This allows for a quick way to test certain aspects of your Android.

Is there a secret code to unlock any phone?

Here's the reality: Android phones don't have universal secret codes that magically unlock devices without deleting data.


What does *3370 do on your phone?

Pressing the *3370# keys on your iPhone or Android device does not improve your cell phone signal. As mentioned, the code *3370# activates Enhanced Full Rate Codec on specific devices. Since users would experience better voice quality after entering the code, many assumed it was due to better signal.

What does *#21 do to your phone?

Dialing *#21# on your phone checks the status of your unconditional call forwarding, showing if all your calls, data, and messages are being sent to another number, which is often spread online as a "phone tapping" check but is really just a network setting report from your carrier. It reveals if call forwarding is active and to what number, helping you spot if someone (like a partner or hacker) secretly set it up, though it doesn't detect sophisticated spyware.
 


Secret Android Phone Codes You Didn't Know Existed



What does *82 mean on a cell phone?

Dialing *82 before a phone number on a cell phone temporarily overrides your Caller ID blocking for that single call, making your number appear on the recipient's phone instead of "Blocked" or "Private," allowing calls to lines with Anonymous Call Rejection (*77) to go through. It's the opposite of *67, which hides your number, and it's useful for reaching people who block all private calls. 

What does *#62 do to your phone?

Dialing \*#62# on your phone checks where your calls are being forwarded when your phone is unreachable (like turned off or out of service), revealing the number for voicemail or an alternate contact set by your carrier; it's a diagnostic tool to see if any unauthorized call forwarding is active, which could be a sign of monitoring.
 

What does *74 do on a phone?

Call Forward on Busy ( *73 / *74 )​

The Call Forward on Busy feature redirects calls to another number when your extension is busy.


What is the ##72786# secret code?

Carrier Reset Settings: ##72786# and ##873283# What is a Carrier Reset? A carrier reset can help resolve data connection problems by re-provisioning your phone onto the wireless network.

What is the 4636 secret code?

The 4636 code is a secret diagnostic code that grants Android phone users access to system information. With this code, one can check their data usage statistics and other features which is not typically available through the standard user interface.

What does *#9900 mean?

If you dial this code on your keypad, a window will open where you can click on 'Delete dumpstate/logcat' to remove all junk files from your phone, making it a bit faster!


What is *#2663 used for?

3️⃣ Dial *#2663# to refresh your Wi-Fi and boost internet speed. Click on TSP FW Update for touch screen firmware updates.

What is all mobile phone secret code?

*#9090# – Display diagnostic configuration. *#7353# – Open the Quick test menu. *#*#273282*255*663282*#*#* – Make a backup of your media files. *#*#7780#*#* – Factory reset your Android phone.

How to use *# 0011 code?

Make sure your phone is in 4G mode (4G icon on your phone). Dial the code *#0011# and press the “Call” button. This will take you to the Samsung Galaxy's service menu.


What does *#2663 do?

*#2663# Dial this code and, in the window that opens, click on 'Refresh WiFi Version. ' This will slightly improve your phone's WiFi performance!

What happens if I dial *#07?

The code *#07# is a universal standard for most modern Android devices globally, including in India and the US. For iPhones, this code does not work. If you still can't find your SAR value, simply search on Google or ask an AI assistant with your phone model name.

What does *82 do to your phone?

Dialing *82 before a phone number on a cell phone temporarily overrides your Caller ID blocking for that single call, making your number appear on the recipient's phone instead of "Blocked" or "Private," allowing calls to lines with Anonymous Call Rejection (*77) to go through. It's the opposite of *67, which hides your number, and it's useful for reaching people who block all private calls. 


What does *228 do to a Verizon phone?

\*228 on Verizon was a special code for older 3G phones to manually update their Preferred Roaming List (PRL) and reprogram network settings, helping phones find the best towers; however, it's generally not used for modern 4G/LTE/5G phones, which handle roaming and updates automatically via their SIM cards, and dialing it on newer devices can actually cause problems,. For LTE devices, power cycling or checking SIM card issues are the modern fixes, not *228. 

What is a reset code?

A reset code is used to access a dedicated page where you can reset your passwords and PINs. Please note that reset codes are not a replacement for your sign-in password. They will become invalid once the reset procedure is completed.

What happens when you dial *35*0000?

How to block every incoming call. incoming calls to your line: *35*0000#.


What does *88 do on a phone?

Call Retrieve Used to retrieve a parked call. Enter *88 followed by the extension that call is parked against. If the call is parked against your own extension, press the # key.

What does *63 do on a phone?

About Selective Call Forwarding (*63)

Selective Call Forwarding lets you program your office phone to direct incoming calls from specific phone numbers you have pre-selected to a different number - such as your cellular phone - when you're away from your office.

What does *21* number do?

The code *21*<number># activates unconditional call forwarding, sending all your calls to the <number> you enter, even if your phone is on; it's part of a set of GSM codes for managing call diversions, not a secret "hacking" tool, but it's often misunderstood on social media as a spy-check code (for which *#21# checks the status). 


What happens if you dial *#6?

Access the personal IMEI number by keying *#06# the 15 digit serial number will appear on the screen. Make a note of the number and register the details with your operator, in the event that your phone is stolen you report it to you operator who should then be able to bar the SIM card.

What does *72 do on a cell phone?

Call forwarding is often enabled by dialing *72 followed by the telephone number to which calls should be forwarded. Once someone answers, call forwarding is in effect. If no one answers or the line is busy, the dialing sequence must be repeated to effect call forwarding. Call forwarding is disabled by dialing *73.