6 Android Secret Codes You Should Know
Hidden menus, hardware tests, and phone information — without installing another app.
Your Android phone has a second layer of controls hiding behind the ordinary dialer. These are usually called USSD or MMI codes, and some Android manufacturers also support special diagnostic codes.
They aren’t magic hacks. They’re shortcuts into information or testing functions that aren’t always exposed in the regular interface.
1. *#06# — Check your IMEI
This is probably the safest code on the list. Dialing it can display your phone’s IMEI number, a unique identifier associated with the device.
It’s useful when checking device information, dealing with a carrier, or comparing the IMEI shown on the phone with the one printed on its packaging.
Don’t post your IMEI publicly.
2. *#*#4636#*#* — Android testing information
On supported phones, this can open a testing menu containing information about the phone, battery, network connection and other device details.
The catch: it doesn’t work on every Android phone, and manufacturers can restrict or change these menus.
3. *#*#232338#*#* — Wi-Fi information
Some Android devices recognize this code for displaying information related to the phone’s Wi-Fi hardware, including its MAC address.
Useful when troubleshooting network identification issues.
4. *#*#426#*#* — Google Play services diagnostics
On supported Android devices, this can expose diagnostic information related to Google Play services and its messaging connection.
It’s more useful for troubleshooting than everyday phone use.
5. *#*#0*#*#* — Hardware testing
Certain Samsung devices have historically used this code to open hardware test screens, including checks for things such as the display.
If your phone ignores it, that’s normal. Diagnostic codes are heavily manufacturer-dependent.
6. *#*#232339#*#* — Wireless LAN test
Some Android devices recognize this as a wireless LAN testing shortcut. Again, support varies by manufacturer and software version.
Don’t randomly dial codes
The important part isn’t memorizing every secret code you find online. Some manufacturer-specific codes can change settings, trigger tests, or even erase data.
Think of these codes like service-panel shortcuts: useful when you know what you’re opening, risky when you’re just pressing buttons to see what happens.
And if a code doesn’t work on your phone, that doesn’t necessarily mean anything is wrong. Android isn’t one uniform system — Samsung, Google, Xiaomi, Motorola and other manufacturers can expose completely different diagnostic menus.
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