10 Codes That Unlock Hidden Features on Your Phones
Coders have a special storied tradition of baking in secret passageways ( Or sometimes, just fun little Easter eggs) that these hidden features are can only be accessed by inputting a special Keys. And so that tradition continues in the mobile age.
Unstructured Supplementary Service Data (USSD). Sometimes known as “Quick Codes” or “Features Codes” is an extra UL protocol, which allows people to access hidden features. This Protocol was originally created by GSM Phones but can be found on CDMA devices as well.
If you really want to try them out, your best bet may be to Google your phone’s make and carrier + “USSD” for a tailored, comprehensive list. I attempted a number of codes using an iPhone SE (while trading out numerous carrier SIM cards) in addition to a Galaxy S5 and Galaxy S7 Edge running on AT&T. Some of them worked! Check out the list below for 13 codes that I can confirm worked on at least one device.
Good luck and have fun!
Unlock Hidden Features on Android
1. Field Mode: *3001#12345#*
Type *3001#12345#* into your phone’s dialer and then press the green call button to access “Field Mode,” which can give you access to info about local networks and cell towers.
You’ll probably never ever have to know about your local cell tower’s “Measured RSSi,” but it’s fun to look around for a bit.
2. General Test Mode: *#0*#
I could only get this to work on Android. But this prompts a library of different phone operations, which could be operated with a single push (e.g. Sleep, Front Cam, Vibration).
3. Display your IMEI: *#06#
Here are code features which I found out does not work with Verizon on an iPhone, but I could make it work after switching to a T-Mobile SIM. It also worked on my Android AT&T device as well. To access it, type in the above code, and then the green call button to prompt your IMEI number (or your International Mobile Station Equipment Identity number, but you already knew that).
The IMEI is unique to your device. Among other things, the number can help “blacklist” stolen devices or help with customer support.
4. Check Your Call Forwarding: *#67#
This code allows you to check which number your phone is currently forwarding calls to when you’re busy or reject a call.
By default, this is probably your carrier’s voicemail service, but you can change it to forward to a different number (a home number, office number, or third-party answering service for example). On an iPhone, you can change this number by going to Settings > Phone > Call Forwarding. On Android (varies from system to system), tap the Phone app > hamburger icon > Settings > Call > More Settings > Call forwarding
5. Get Even More Info on Call Forwarding: *#61#
On my Galaxy phone, this code prompted a pop-up that let me know how long until a call is forwarded to the message center. On the iPhone, regardless of carrier, this code just showed me the same info as *#67#.
6. Hide Your Phone From Caller ID: #31#
I could only get this to work on Android. But entering this code prompted a pop-up stating that my Caller ID had been disabled. In order to re-instate Caller ID, enter *31#.
7. Activate Call Waiting: *43#
This code Features will activate call waiting; you can deactivate it by entering #43#.
8. Quick Test Menu (Samsung Galaxy Only) *#7353#
As far as I can tell, this code only works on Samsung Galaxy models (I tested it on my Galaxy S7 Edge). This is similar to the General Test mode mentioned earlier, in that it brings up a menu with a number of one-tap test prompts.
The first test is “Melody,” which prompts a jaunty little K-Pop diddy. I don’t know who the artist is (it’s un-Shazammable!), but a search of the lyrics pointed me to this YouTube clip, with a title that translates to “Samsung Any call Galaxy basic level – Hey Now (Good bye).” If you have any details on this mobile mystery, drop it in the comments.
9. Firmware (Samsung Galaxy Only) *#1234#
Once again, as far as I can tell, this only works on Galaxy devices. But it will let you know your phone’s current firmware. So, have fun with that.
10. SMS Message Center: *5005*7672#
This is a good features code that will tell you your SMS message center number.
Thanks and wish all the best.
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