iPhone Secret Codes to Access Hidden Features

Want to impress your friends with your superior iPhone knowledge? Hidden secret codes are what you must try. 

With these hidden codes, you can quickly change internal settings, get additional information or unlock a bunch of hidden features. For example, by using the code *3001#12345#*, you can replace the default signal strength icon on your iPhone with a numerical representation of reception strength. (ie. a number instead of circles). In fact, there are many more codes waiting for you to discover.

Curious? Let’s read on and I’ll show you the rest of the list of best hidden secret codes on iPhone and iPad.

Before going ahead with the tutorial, note that some codes might not work with your carrier. If a code is not working for you, it might be disabled by your telecommunication company.

1. How to execute hidden codes

These hidden secret codes are the combinations of numbers and the asterisk (*) and the hash (#) symbols. To use them, you just need to launch the Phone app, switch to the Keypad tab and type in these codes. Some of them require you to press the green call button to start executing while others will work as soon as you hit the final #.

2. The list of hidden iPhone codes

CodesFunctionality
*3001#12345#Open Field Test Mode
*#21#Call forwarding status
*#67#Call forwarding when the iPhone is busy
*#62#Call forwarding when the iPhone is unreachable
##002# + ‘Call’Disable all forwarding
*#06#Get your iPhone's IMEI number quickly
*#33#Show Call Barring Status
*33*PIN#Turn on Call Barring
#33*PIN#Turn off Call Barring
*#43#Show Call Waiting Status
*43#Enable Call Waiting
#43#Disable Call Waiting
*#31#Check Outgoing Call Anonymity Status
#31#phone-number + ‘Call’Initiate an anonymous call to a specified number
*#30# + ‘Call’Show if your iPhone will display the number of incoming calls.
*#5005*7672# + ‘Call’get your carrier’s text message center number
*3370# + ‘Call’Turn ON or OFF EFR mode(Enhanced Full Rate)
*646# (Postpaid only)Check minutes left on contract
*225# (Postpaid only)Find out your current mobile account balance
*777# (Postpaid only)Find out prepaid account balance
*#61#Find out the number of missed calls

So I’ve just listed out the most necessary codes as well as their functionality. I know you might be confused about this stuff. But don’t worry and keep reading. I will give you a more detailed look at these codes and how you can take advantage of them in the next section.

3. The use of iPhone codes

  • IMEI Number:  The 15-digit code that uniquely identifies your device within GSM, UTMS, and all other mobile phone networks.
  • Field Test Mode: The mode contains all of iPhone inner settings, cell information and newest network. As I’ve mentioned in the beginning, the most interesting part of using this code is it allows you to see precise signal strength measured in numbers. Instead of displaying some circles in the top left corner of your screen, it will show you something such as ‘-90’ or ‘-100’.
    • How to make the number appear: Dial *3001#12345# to enter the Field Test mode. Then immediately hold the power button until you see the “Slide to power off”slider. Now press and hold the Home button until you’re back on the Home screen. Here is the resultiPhone numeric signal
    • How to read the number: It is always a negative number. If you see any value above -80, it means you have a pretty good signal. Otherwise, anything below -100 is bad.How to read iPhone numeric signal
  • Call barring allows you to block incoming and outgoing calls.
  • Call waiting allows you to place incoming or current calls on hold.
  • If you pay for Call Barring, Call Waiting or Call Forwarding services, then you can use the codes in this post to quickly access them.
  • The EFR mode (Enhanced Full Rate): This mode is used for improving voice quality for GSM conversations. It also consumes a bit more battery life and not available for all networks.

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