Secret Codes That Unlock Hidden Phone Features

David & David tell you about 13 secret codes that unlock hidden features on your iPhone. They can even help you figure out if your phone is being tracked!

0. Intro [0:00]
1. Field Test Mode [0:14]
2. Better Call Quality [1:37]
3. Call Forwarding [2:24]
4. Carrier Customer Support [3:45]
5. Make Anonymous Calls [3:58]
6. Call Tracing [5:24]
7. Scam Blocking [6:09]
8. Nationwide Wireless Priority Service [6:56]
9. Check Your Phone’s IMEI [8:01]
10. iPhone Legal & Regulatory Settings [8:31]
11. Call Waiting [8:51]
12. Prevent Outgoing Calls [9:16]
13. Anonymous Call Rejection [10:17]

Note: Some codes may not work for you, depending on your phone model and wireless carrier.

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Have any other secret codes? Let us know in the comments below! If you found this video interesting, be sure to LIKE and SHARE it with your friends!

[Misty_Dawn]

Haha!! Miss Cleo! “Call me now!” That’s too funny! Man what a throwback! I remember that commercial coming on tv all the time when I was little! 😂😂😂

[singefrost]

ACR cube allows you to record your cell phone calls....you can set it to make turning recording on manual and you get an overlay button you push to start/stop recording

[Thomas-yrln]

Nice to see one of your informative videos. Years ago sprint used to sell what they called Repeators. If you lived in a house or apartment with poor cell phone reception you would put it in a window of your house and it would pick up the signal and amplify it throughout your home.

[timo-zoro]

Thanks for this, setting expectations when i open them

[pushedtopurposeministries]

Hi, is there a code to use If your calls are being tapped. And ##21# has been blocked by the tapper?

[KatTre]

Lol I really did LOL when you said Miss Cleo! I had totally forgotten about those commercials!

[paigea.vecchitto]

I have iphone 12ProMax & Verizon. Also rcvd “error msgs” & not all info came up. Would be GREAT if explained why? R there apps or settings blocking this info???🤔

[richjohnson]

Hey guys, great video as always. A number of these codes did not work on my iPhone 13mini with Verizon. After punching in the code to activate the spam feature, I got "Error performing request--Unkown error". Any ideas? RJ

[williameverets]

Signal test works, But When I install *3370# Error performing request unknown error appears on iPhone 13 pro max? My carrie is at&t. some code like spam block and turn on spam block says error performing request.

[AdidasLove]

Great vid!!! And Miss Cleo !!!You went there…That tickled meeee😂😂😂😂😂😂😂

[David]

Hi Guys, can you give a list of the codes and what they do, and will they work in the UK.

[chrismerson]

It would be great if some of these codes such as spam block worked in the UK.

[bob-a-job]

Appreciate your insightful vids. guys.
Would you know whether these secret self-diagnostic codes are universal and will work for mobile phone networks outside of the US & Canada?
Much obliged.
Bob

[adamrenissance]

Is there a feature that notifies you when you are receiving a call that has been forwarded by a second work phone? Thanks

[robertvankees]

You're both of you are amazing forming a complete team..🎉 ifo you explain always very good & useful.
Great effort, hope you success and forward..

[forrestegan]

So far two of the first three didn’t work and the menu for Field Test was completely different than shown. What’s the minimum iPhone needed to use these codes? I’m on an iPhone 8 Plus running iOS 16.6.1.

[letehgp]

Hi, I am trying several of the dialing codes that you guys suggested and most of them come up with the following message: "Error performing request Uknown Error"I have an iPhone 13 running IOS 17.o PB and I live in Brazil. My cell provider is TIM (The Italian mobile phone provider).

[DaveS-pwqc]

Tried *#21#, got call forwarding [ Conn prob or invalid MMI code ] on another cell it seemed to work (three beeps).
Is there a way to query which USSD codes sets are for the carrier? Like VER on old DOS os.

[mikeyoungling]

I have a galaxy 21 alot of the codes worked but did not pop a menu like you guys are getting. Just prompt saying mmi doing something or not